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[PATCH v2 04/10] block: Introduce a new ioctl for copy Date: Mon, 7 Feb 2022 19:43:42 +0530 Message-Id: <20220207141348.4235-5-nj.shetty@samsung.com> X-Mailer: git-send-email 2.30.0-rc0 In-Reply-To: <20220207141348.4235-1-nj.shetty@samsung.com> MIME-Version: 1.0 X-Brightmail-Tracker: H4sIAAAAAAAAA02TfyycdxzH832eu+ceVvLs6HzJbLdTW1Dctce+p1Ua0jypbZFuaZZmYQ/3 DOHO5Y61XcToaVe/lbTT6+Jom8mYVv04WkeLoYrN5rfVVBAJSnGM0dpxZ+t/r8+P9/f9/Xy+ +ZI4v5LnRMYoEliVgokTEtYcfaubm2eeO4gQ/VaMI8PICheVj+US6NqLDRwtNk9yUX5uIQ/1 TdmixoUbXNS7noqhyaptDBlu5mPop/I2DM2U3gIovasXQ1sTYtS2/ZxA+S2DADWOeiBDYycH 6X6c5qHMoXoCNc014qi04xWGrlwewNCv2i0C6Td1OGr9a4CDyrcQupi1wUOzD8MCnem+/hD6 imaBR2uKn3Lovp5EuqosnaCrb39LFwyXArphJIWgL3S34XThspGgh7rrMDpbs0DQS9OjHFo/ kc2jF5sGCDqnpgyE2p+JPRrNMjJWJWAVkfGyGEWUvzDk0/CgcB9fkdhTLEUfCgUKRs76C4M/ CvU8ERNnWpJQ8DUTl2hKhTJqtdD72FFVfGICK4iOVyf4C1mlLE4pUXqpGbk6URHlpWAT/MQi 0SEfU+OXsdELFQZM2Q3P9egy8RSgs88AViSkJLAqPQdkAGuSTzUAOLs+ipuDZQD1m608c7AC 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YtqHn8wW7w8+ZrWY1D+D3eLyEz6Lve9ms1pc+NHIZPF4038miz2LJjFZrFx9lMni+fLFjBad py8wWfx5aGhx9P9bNotJh64xWuy9pW2xZ+9JFov5y56yW3Rf38Fmse/1XmaL5cf/MVlM7LjK ZHFu1h82i22/5zNbHL53lcVi9R8Li9aen+wWr/bHOch6XL7i7TGx+R27R/OCOywel8+Wemxa 1cnmsXlJvcfkG8sZPXbfbGDzaDpzlNljxqcvbB7Xz2xn8uhtfsfm8fHpLRaPbQ972T3e77vK 5tG3ZRVjgEgUl01Kak5mWWqRvl0CV8a7tXuYCs5IVJyd383cwDhfpIuRk0NCwERia8t91i5G Lg4hgR2MEs/bu9khEpISy/4eYYawhSVW/nsOFhcSaGaSOHVSp4uRg4NNQFvi9H8OkLCIgLjE nwvbGEHmMAtMZ5VoOHWZCSQhLGAvcWzjKjYQm0VAVaLnUwsLiM0rYCnx5cAXqPnKEgsfHmQF sTkFrCS+/ZnGAnFQA6NEw7kVrBANghInZz4Ba2YWkJdo3jqbeQKjwCwkqVlIUgsYmVYxSqYW FOem5xYbFhjlpZbrFSfmFpfmpesl5+duYgSnBC2tHYx7Vn3QO8TIxMF4iFGCg1lJhFem+3+i EG9KYmVValF+fFFpTmrxIUZpDhYlcd4LXSfjhQTSE0tSs1NTC1KLYLJMHJxSDUxCO59dctb8 f/N7q7Bdk+m3NVvTdu+o93Sa8e3ceYUu/6znW9K2MTenP7EVEPBfbzH7gPvNL3vLpPQ+aTCb PHE5F6kVLix98I3T2YpdZ2ovyDw+GVRXN8VfyrMiZP/sLuvS7OLEAwuTDF90rfczNlv+S2XZ jSvms3NcTNg8xQU0TjCvXn/b8Whs19P5q1/k8Dpt+K+0ufhPp3+/Z82j5iLZHQ9/GhyuPmK9 MN7VMdWk4mNPZNTpYIe+U5kuggc+WiQ0P/xRLWdy+eyJSAenM067SnmjNTf5hT1lEtpTOPnq JHfRWu/rApdVrjrx9Ew66+W8+sT6tWfvFr0v/z65YE1K2empryuvBlUYK1nanFJiKc5INNRi LipOBABRSx0eeAMAAA== X-CMS-MailID: 20220207141924epcas5p26ad9cf5de732224f408aded12ed0a577 X-Msg-Generator: CA X-Sendblock-Type: REQ_APPROVE CMS-TYPE: 105P DLP-Filter: Pass X-CFilter-Loop: Reflected X-CMS-RootMailID: 20220207141924epcas5p26ad9cf5de732224f408aded12ed0a577 References: <20220207141348.4235-1-nj.shetty@samsung.com> Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Add new BLKCOPY ioctl that offloads copying of one or more sources ranges to one or more destination in a device. COPY ioctl accepts a 'copy_range' structure that contains no of range, a reserved field , followed by an array of ranges. Each source range is represented by 'range_entry' that contains source start offset, destination start offset and length of source ranges (in bytes) Signed-off-by: Nitesh Shetty Signed-off-by: Arnav Dawn Reported-by: kernel test robot --- block/ioctl.c | 37 +++++++++++++++++++++++++++++++++++++ include/uapi/linux/fs.h | 9 +++++++++ 2 files changed, 46 insertions(+) diff --git a/block/ioctl.c b/block/ioctl.c index 4a86340133e4..d77f6143287e 100644 --- a/block/ioctl.c +++ b/block/ioctl.c @@ -124,6 +124,41 @@ static int blk_ioctl_discard(struct block_device *bdev, fmode_t mode, return err; } +static int blk_ioctl_copy(struct block_device *bdev, fmode_t mode, + unsigned long arg) +{ + struct copy_range crange, *ranges; + size_t payload_size = 0; + int ret; + + if (!(mode & FMODE_WRITE)) + return -EBADF; + + if (copy_from_user(&crange, (void __user *)arg, sizeof(crange))) + return -EFAULT; + + if (unlikely(!crange.nr_range || crange.reserved || crange.nr_range >= MAX_COPY_NR_RANGE)) + return -EINVAL; + + payload_size = (crange.nr_range * sizeof(struct range_entry)) + sizeof(crange); + + ranges = kmalloc(payload_size, GFP_KERNEL); + if (!ranges) + return -ENOMEM; + + if (copy_from_user(ranges, (void __user *)arg, payload_size)) { + ret = -EFAULT; + goto out; + } + + ret = blkdev_issue_copy(bdev, ranges->nr_range, ranges->range_list, bdev, GFP_KERNEL, 0); + if (copy_to_user((void __user *)arg, ranges, payload_size)) + ret = -EFAULT; +out: + kfree(ranges); + return ret; +} + static int blk_ioctl_zeroout(struct block_device *bdev, fmode_t mode, unsigned long arg) { @@ -455,6 +490,8 @@ static int blkdev_common_ioctl(struct block_device *bdev, fmode_t mode, case BLKSECDISCARD: return blk_ioctl_discard(bdev, mode, arg, BLKDEV_DISCARD_SECURE); + case BLKCOPY: + return blk_ioctl_copy(bdev, mode, arg); case BLKZEROOUT: return blk_ioctl_zeroout(bdev, mode, arg); case BLKGETDISKSEQ: diff --git a/include/uapi/linux/fs.h b/include/uapi/linux/fs.h index 55bca8f6e8ed..190911ea4311 100644 --- a/include/uapi/linux/fs.h +++ b/include/uapi/linux/fs.h @@ -78,6 +78,14 @@ struct range_entry { __u64 comp_len; }; +struct copy_range { + __u64 nr_range; + __u64 reserved; + + /* Range_list always must be at the end */ + struct range_entry range_list[]; +}; + /* extent-same (dedupe) ioctls; these MUST match the btrfs ioctl definitions */ #define FILE_DEDUPE_RANGE_SAME 0 #define FILE_DEDUPE_RANGE_DIFFERS 1 @@ -199,6 +207,7 @@ struct fsxattr { #define BLKROTATIONAL _IO(0x12,126) #define BLKZEROOUT _IO(0x12,127) #define BLKGETDISKSEQ _IOR(0x12,128,__u64) +#define BLKCOPY _IOWR(0x12, 129, struct copy_range) /* * A jump here: 130-136 are reserved for zoned block devices * (see uapi/linux/blkzoned.h)