From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Vishal Verma Subject: [PATCH 1/5] block, dax: pass blk_dax_ctl through to drivers Date: Thu, 24 Mar 2016 17:17:26 -0600 Message-Id: <1458861450-17705-2-git-send-email-vishal.l.verma@intel.com> In-Reply-To: <1458861450-17705-1-git-send-email-vishal.l.verma@intel.com> References: <1458861450-17705-1-git-send-email-vishal.l.verma@intel.com> Sender: owner-linux-mm@kvack.org To: linux-nvdimm@lists.01.org Cc: Dan Williams , linux-fsdevel@vger.kernel.org, linux-block@vger.kernel.org, xfs@oss.sgi.com, linux-ext4@vger.kernel.org, linux-mm@kvack.org, Matthew Wilcox , Ross Zwisler , Dave Chinner , Jan Kara , Jens Axboe , Al Viro , Andrew Morton List-ID: From: Dan Williams From: Dan Williams This is in preparation for doing badblocks checking against the requested sector range in the driver. Currently we opportunistically return as much data that can be "dax'd" starting at the given sector. When errors are present we want to limit that range to the first encountered error, or fail the dax request if the range encompasses an error. Signed-off-by: Dan Williams --- arch/powerpc/sysdev/axonram.c | 10 +++++----- drivers/block/brd.c | 9 +++++---- drivers/nvdimm/pmem.c | 9 +++++---- drivers/s390/block/dcssblk.c | 12 ++++++------ fs/block_dev.c | 2 +- include/linux/blkdev.h | 3 +-- 6 files changed, 23 insertions(+), 22 deletions(-) diff --git a/arch/powerpc/sysdev/axonram.c b/arch/powerpc/sysdev/axonram.c index 0d112b9..d85673f 100644 --- a/arch/powerpc/sysdev/axonram.c +++ b/arch/powerpc/sysdev/axonram.c @@ -139,17 +139,17 @@ axon_ram_make_request(struct request_queue *queue, struct bio *bio) /** * axon_ram_direct_access - direct_access() method for block device - * @device, @sector, @data: see block_device_operations method + * @dax: see block_device_operations method */ static long -axon_ram_direct_access(struct block_device *device, sector_t sector, - void __pmem **kaddr, pfn_t *pfn) +axon_ram_direct_access(struct block_device *device, struct blk_dax_ctl *dax) { + sector_t sector = get_start_sect(device) + dax->sector; struct axon_ram_bank *bank = device->bd_disk->private_data; loff_t offset = (loff_t)sector << AXON_RAM_SECTOR_SHIFT; - *kaddr = (void __pmem __force *) bank->io_addr + offset; - *pfn = phys_to_pfn_t(bank->ph_addr + offset, PFN_DEV); + dax->addr = (void __pmem __force *) bank->io_addr + offset; + dax->pfn = phys_to_pfn_t(bank->ph_addr + offset, PFN_DEV); return bank->size - offset; } diff --git a/drivers/block/brd.c b/drivers/block/brd.c index cb27190..0b8bcfa 100644 --- a/drivers/block/brd.c +++ b/drivers/block/brd.c @@ -380,9 +380,10 @@ static int brd_rw_page(struct block_device *bdev, sector_t sector, } #ifdef CONFIG_BLK_DEV_RAM_DAX -static long brd_direct_access(struct block_device *bdev, sector_t sector, - void __pmem **kaddr, pfn_t *pfn) +static long brd_direct_access(struct block_device *bdev, + struct blk_dax_ctl *dax) { + sector_t sector = get_start_sect(bdev) + dax->sector; struct brd_device *brd = bdev->bd_disk->private_data; struct page *page; @@ -391,8 +392,8 @@ static long brd_direct_access(struct block_device *bdev, sector_t sector, page = brd_insert_page(brd, sector); if (!page) return -ENOSPC; - *kaddr = (void __pmem *)page_address(page); - *pfn = page_to_pfn_t(page); + dax->addr = (void __pmem *)page_address(page); + dax->pfn = page_to_pfn_t(page); return PAGE_SIZE; } diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c index ca5721c..da10554 100644 --- a/drivers/nvdimm/pmem.c +++ b/drivers/nvdimm/pmem.c @@ -167,14 +167,15 @@ static int pmem_rw_page(struct block_device *bdev, sector_t sector, return rc; } -static long pmem_direct_access(struct block_device *bdev, sector_t sector, - void __pmem **kaddr, pfn_t *pfn) +static long pmem_direct_access(struct block_device *bdev, + struct blk_dax_ctl *dax) { + sector_t sector = get_start_sect(bdev) + dax->sector; struct pmem_device *pmem = bdev->bd_disk->private_data; resource_size_t offset = sector * 512 + pmem->data_offset; - *kaddr = pmem->virt_addr + offset; - *pfn = phys_to_pfn_t(pmem->phys_addr + offset, pmem->pfn_flags); + dax->addr = pmem->virt_addr + offset; + dax->pfn = phys_to_pfn_t(pmem->phys_addr + offset, pmem->pfn_flags); return pmem->size - pmem->pfn_pad - offset; } diff --git a/drivers/s390/block/dcssblk.c b/drivers/s390/block/dcssblk.c index ce7b701..e5bda68 100644 --- a/drivers/s390/block/dcssblk.c +++ b/drivers/s390/block/dcssblk.c @@ -30,8 +30,8 @@ static int dcssblk_open(struct block_device *bdev, fmode_t mode); static void dcssblk_release(struct gendisk *disk, fmode_t mode); static blk_qc_t dcssblk_make_request(struct request_queue *q, struct bio *bio); -static long dcssblk_direct_access(struct block_device *bdev, sector_t secnum, - void __pmem **kaddr, pfn_t *pfn); +static long dcssblk_direct_access(struct block_device *bdev, + struct blk_dax_ctl *dax) static char dcssblk_segments[DCSSBLK_PARM_LEN] = "\0"; @@ -883,9 +883,9 @@ fail: } static long -dcssblk_direct_access (struct block_device *bdev, sector_t secnum, - void __pmem **kaddr, pfn_t *pfn) +dcssblk_direct_access(struct block_device *bdev, struct blk_dax_ctl *dax) { + sector_t secnum = get_start_sect(bdev) + dax->sector; struct dcssblk_dev_info *dev_info; unsigned long offset, dev_sz; @@ -894,8 +894,8 @@ dcssblk_direct_access (struct block_device *bdev, sector_t secnum, return -ENODEV; dev_sz = dev_info->end - dev_info->start; offset = secnum * 512; - *kaddr = (void __pmem *) (dev_info->start + offset); - *pfn = __pfn_to_pfn_t(PFN_DOWN(dev_info->start + offset), PFN_DEV); + dax->addr = (void __pmem *) (dev_info->start + offset); + dax->pfn = __pfn_to_pfn_t(PFN_DOWN(dev_info->start + offset), PFN_DEV); return dev_sz - offset; } diff --git a/fs/block_dev.c b/fs/block_dev.c index 826b164..9c0765b 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -488,7 +488,7 @@ long bdev_direct_access(struct block_device *bdev, struct blk_dax_ctl *dax) sector += get_start_sect(bdev); if (sector % (PAGE_SIZE / 512)) return -EINVAL; - avail = ops->direct_access(bdev, sector, &dax->addr, &dax->pfn); + avail = ops->direct_access(bdev, dax); if (!avail) return -ERANGE; if (avail > 0 && avail & ~PAGE_MASK) diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 413c84f..f8c65b8 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -1653,8 +1653,7 @@ struct block_device_operations { int (*rw_page)(struct block_device *, sector_t, struct page *, int rw); int (*ioctl) (struct block_device *, fmode_t, unsigned, unsigned long); int (*compat_ioctl) (struct block_device *, fmode_t, unsigned, unsigned long); - long (*direct_access)(struct block_device *, sector_t, void __pmem **, - pfn_t *); + long (*direct_access)(struct block_device *, struct blk_dax_ctl *dax); unsigned int (*check_events) (struct gendisk *disk, unsigned int clearing); /* ->media_changed() is DEPRECATED, use ->check_events() instead */ -- 2.5.5 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from relay.sgi.com (relay2.corp.sgi.com [137.38.102.29]) by oss.sgi.com (Postfix) with ESMTP id CC7237CA3 for ; Thu, 24 Mar 2016 18:17:55 -0500 (CDT) Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by relay2.corp.sgi.com (Postfix) with ESMTP id A0118304051 for ; Thu, 24 Mar 2016 16:17:55 -0700 (PDT) Received: from mga11.intel.com ([192.55.52.93]) by cuda.sgi.com with ESMTP id EeLyOKigRqy8aAZg for ; Thu, 24 Mar 2016 16:17:54 -0700 (PDT) From: Vishal Verma Subject: [PATCH 1/5] block, dax: pass blk_dax_ctl through to drivers Date: Thu, 24 Mar 2016 17:17:26 -0600 Message-Id: <1458861450-17705-2-git-send-email-vishal.l.verma@intel.com> In-Reply-To: <1458861450-17705-1-git-send-email-vishal.l.verma@intel.com> References: <1458861450-17705-1-git-send-email-vishal.l.verma@intel.com> List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: xfs-bounces@oss.sgi.com Sender: xfs-bounces@oss.sgi.com To: linux-nvdimm@lists.01.org Cc: Jens Axboe , Jan Kara , Andrew Morton , xfs@oss.sgi.com, linux-block@vger.kernel.org, linux-mm@kvack.org, Matthew Wilcox , linux-fsdevel@vger.kernel.org, Dan Williams , linux-ext4@vger.kernel.org, Ross Zwisler , Al Viro From: Dan Williams From: Dan Williams This is in preparation for doing badblocks checking against the requested sector range in the driver. Currently we opportunistically return as much data that can be "dax'd" starting at the given sector. When errors are present we want to limit that range to the first encountered error, or fail the dax request if the range encompasses an error. Signed-off-by: Dan Williams --- arch/powerpc/sysdev/axonram.c | 10 +++++----- drivers/block/brd.c | 9 +++++---- drivers/nvdimm/pmem.c | 9 +++++---- drivers/s390/block/dcssblk.c | 12 ++++++------ fs/block_dev.c | 2 +- include/linux/blkdev.h | 3 +-- 6 files changed, 23 insertions(+), 22 deletions(-) diff --git a/arch/powerpc/sysdev/axonram.c b/arch/powerpc/sysdev/axonram.c index 0d112b9..d85673f 100644 --- a/arch/powerpc/sysdev/axonram.c +++ b/arch/powerpc/sysdev/axonram.c @@ -139,17 +139,17 @@ axon_ram_make_request(struct request_queue *queue, struct bio *bio) /** * axon_ram_direct_access - direct_access() method for block device - * @device, @sector, @data: see block_device_operations method + * @dax: see block_device_operations method */ static long -axon_ram_direct_access(struct block_device *device, sector_t sector, - void __pmem **kaddr, pfn_t *pfn) +axon_ram_direct_access(struct block_device *device, struct blk_dax_ctl *dax) { + sector_t sector = get_start_sect(device) + dax->sector; struct axon_ram_bank *bank = device->bd_disk->private_data; loff_t offset = (loff_t)sector << AXON_RAM_SECTOR_SHIFT; - *kaddr = (void __pmem __force *) bank->io_addr + offset; - *pfn = phys_to_pfn_t(bank->ph_addr + offset, PFN_DEV); + dax->addr = (void __pmem __force *) bank->io_addr + offset; + dax->pfn = phys_to_pfn_t(bank->ph_addr + offset, PFN_DEV); return bank->size - offset; } diff --git a/drivers/block/brd.c b/drivers/block/brd.c index cb27190..0b8bcfa 100644 --- a/drivers/block/brd.c +++ b/drivers/block/brd.c @@ -380,9 +380,10 @@ static int brd_rw_page(struct block_device *bdev, sector_t sector, } #ifdef CONFIG_BLK_DEV_RAM_DAX -static long brd_direct_access(struct block_device *bdev, sector_t sector, - void __pmem **kaddr, pfn_t *pfn) +static long brd_direct_access(struct block_device *bdev, + struct blk_dax_ctl *dax) { + sector_t sector = get_start_sect(bdev) + dax->sector; struct brd_device *brd = bdev->bd_disk->private_data; struct page *page; @@ -391,8 +392,8 @@ static long brd_direct_access(struct block_device *bdev, sector_t sector, page = brd_insert_page(brd, sector); if (!page) return -ENOSPC; - *kaddr = (void __pmem *)page_address(page); - *pfn = page_to_pfn_t(page); + dax->addr = (void __pmem *)page_address(page); + dax->pfn = page_to_pfn_t(page); return PAGE_SIZE; } diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c index ca5721c..da10554 100644 --- a/drivers/nvdimm/pmem.c +++ b/drivers/nvdimm/pmem.c @@ -167,14 +167,15 @@ static int pmem_rw_page(struct block_device *bdev, sector_t sector, return rc; } -static long pmem_direct_access(struct block_device *bdev, sector_t sector, - void __pmem **kaddr, pfn_t *pfn) +static long pmem_direct_access(struct block_device *bdev, + struct blk_dax_ctl *dax) { + sector_t sector = get_start_sect(bdev) + dax->sector; struct pmem_device *pmem = bdev->bd_disk->private_data; resource_size_t offset = sector * 512 + pmem->data_offset; - *kaddr = pmem->virt_addr + offset; - *pfn = phys_to_pfn_t(pmem->phys_addr + offset, pmem->pfn_flags); + dax->addr = pmem->virt_addr + offset; + dax->pfn = phys_to_pfn_t(pmem->phys_addr + offset, pmem->pfn_flags); return pmem->size - pmem->pfn_pad - offset; } diff --git a/drivers/s390/block/dcssblk.c b/drivers/s390/block/dcssblk.c index ce7b701..e5bda68 100644 --- a/drivers/s390/block/dcssblk.c +++ b/drivers/s390/block/dcssblk.c @@ -30,8 +30,8 @@ static int dcssblk_open(struct block_device *bdev, fmode_t mode); static void dcssblk_release(struct gendisk *disk, fmode_t mode); static blk_qc_t dcssblk_make_request(struct request_queue *q, struct bio *bio); -static long dcssblk_direct_access(struct block_device *bdev, sector_t secnum, - void __pmem **kaddr, pfn_t *pfn); +static long dcssblk_direct_access(struct block_device *bdev, + struct blk_dax_ctl *dax) static char dcssblk_segments[DCSSBLK_PARM_LEN] = "\0"; @@ -883,9 +883,9 @@ fail: } static long -dcssblk_direct_access (struct block_device *bdev, sector_t secnum, - void __pmem **kaddr, pfn_t *pfn) +dcssblk_direct_access(struct block_device *bdev, struct blk_dax_ctl *dax) { + sector_t secnum = get_start_sect(bdev) + dax->sector; struct dcssblk_dev_info *dev_info; unsigned long offset, dev_sz; @@ -894,8 +894,8 @@ dcssblk_direct_access (struct block_device *bdev, sector_t secnum, return -ENODEV; dev_sz = dev_info->end - dev_info->start; offset = secnum * 512; - *kaddr = (void __pmem *) (dev_info->start + offset); - *pfn = __pfn_to_pfn_t(PFN_DOWN(dev_info->start + offset), PFN_DEV); + dax->addr = (void __pmem *) (dev_info->start + offset); + dax->pfn = __pfn_to_pfn_t(PFN_DOWN(dev_info->start + offset), PFN_DEV); return dev_sz - offset; } diff --git a/fs/block_dev.c b/fs/block_dev.c index 826b164..9c0765b 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -488,7 +488,7 @@ long bdev_direct_access(struct block_device *bdev, struct blk_dax_ctl *dax) sector += get_start_sect(bdev); if (sector % (PAGE_SIZE / 512)) return -EINVAL; - avail = ops->direct_access(bdev, sector, &dax->addr, &dax->pfn); + avail = ops->direct_access(bdev, dax); if (!avail) return -ERANGE; if (avail > 0 && avail & ~PAGE_MASK) diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 413c84f..f8c65b8 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -1653,8 +1653,7 @@ struct block_device_operations { int (*rw_page)(struct block_device *, sector_t, struct page *, int rw); int (*ioctl) (struct block_device *, fmode_t, unsigned, unsigned long); int (*compat_ioctl) (struct block_device *, fmode_t, unsigned, unsigned long); - long (*direct_access)(struct block_device *, sector_t, void __pmem **, - pfn_t *); + long (*direct_access)(struct block_device *, struct blk_dax_ctl *dax); unsigned int (*check_events) (struct gendisk *disk, unsigned int clearing); /* ->media_changed() is DEPRECATED, use ->check_events() instead */ -- 2.5.5 _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs