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Tue, 14 Sep 2021 23:32:02 +0000 From: Jane Chu To: dan.j.williams@intel.com, vishal.l.verma@intel.com, dave.jiang@intel.com, ira.weiny@intel.com, viro@zeniv.linux.org.uk, willy@infradead.org, jack@suse.cz, nvdimm@lists.linux.dev, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org Subject: [PATCH 1/3] dax: introduce dax_operation dax_clear_poison Date: Tue, 14 Sep 2021 17:31:29 -0600 Message-Id: <20210914233132.3680546-2-jane.chu@oracle.com> X-Mailer: git-send-email 2.18.4 In-Reply-To: <20210914233132.3680546-1-jane.chu@oracle.com> References: <20210914233132.3680546-1-jane.chu@oracle.com> Content-Type: text/plain X-ClientProxiedBy: SN4PR0601CA0008.namprd06.prod.outlook.com (2603:10b6:803:2f::18) To SJ0PR10MB4429.namprd10.prod.outlook.com (2603:10b6:a03:2d1::14) MIME-Version: 1.0 Received: from brm-x62-16.us.oracle.com (2606:b400:8004:44::1b) by SN4PR0601CA0008.namprd06.prod.outlook.com (2603:10b6:803:2f::18) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4500.15 via Frontend Transport; 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second, maintain backend continuity instead of fragmenting it in search for clean blocks. Signed-off-by: Jane Chu --- drivers/dax/super.c | 13 +++++++++++++ include/linux/dax.h | 6 ++++++ 2 files changed, 19 insertions(+) diff --git a/drivers/dax/super.c b/drivers/dax/super.c index 44736cbd446e..935d496fa7db 100644 --- a/drivers/dax/super.c +++ b/drivers/dax/super.c @@ -373,6 +373,19 @@ int dax_zero_page_range(struct dax_device *dax_dev, pgoff_t pgoff, } EXPORT_SYMBOL_GPL(dax_zero_page_range); +int dax_clear_poison(struct dax_device *dax_dev, pgoff_t pgoff, + size_t nr_pages) +{ + if (!dax_alive(dax_dev)) + return -ENXIO; + + if (!dax_dev->ops->clear_poison) + return -EOPNOTSUPP; + + return dax_dev->ops->clear_poison(dax_dev, pgoff, nr_pages); +} +EXPORT_SYMBOL_GPL(dax_clear_poison); + #ifdef CONFIG_ARCH_HAS_PMEM_API void arch_wb_cache_pmem(void *addr, size_t size); void dax_flush(struct dax_device *dax_dev, void *addr, size_t size) diff --git a/include/linux/dax.h b/include/linux/dax.h index b52f084aa643..c54c1087ece1 100644 --- a/include/linux/dax.h +++ b/include/linux/dax.h @@ -36,6 +36,11 @@ struct dax_operations { struct iov_iter *); /* zero_page_range: required operation. Zero page range */ int (*zero_page_range)(struct dax_device *, pgoff_t, size_t); + /* + * clear_poison: clear media error in the given page aligned range via + * vendor appropriate method. Optional operation. + */ + int (*clear_poison)(struct dax_device *, pgoff_t, size_t); }; extern struct attribute_group dax_attribute_group; @@ -226,6 +231,7 @@ size_t dax_copy_to_iter(struct dax_device *dax_dev, pgoff_t pgoff, void *addr, size_t bytes, struct iov_iter *i); int dax_zero_page_range(struct dax_device *dax_dev, pgoff_t pgoff, size_t nr_pages); +int dax_clear_poison(struct dax_device *dax_dev, pgoff_t pgoff, size_t nr_pages); void dax_flush(struct dax_device *dax_dev, void *addr, size_t size); ssize_t dax_iomap_rw(struct kiocb *iocb, struct iov_iter *iter, -- 2.18.4