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Wed, 23 Nov 2022 15:10:24 +0900 (KST) Received: from test-zns.sa.corp.samsungelectronics.net (unknown [107.110.206.5]) by epsmtip1.samsung.com (KnoxPortal) with ESMTPA id 20221123061021epsmtip1ff00839ccb85553e37f8279ede1fac88~qIdd9k6Z32063320633epsmtip1C; Wed, 23 Nov 2022 06:10:21 +0000 (GMT) From: Nitesh Shetty To: axboe@kernel.dk, agk@redhat.com, snitzer@kernel.org, dm-devel@redhat.com, kbusch@kernel.org, hch@lst.de, sagi@grimberg.me, james.smart@broadcom.com, kch@nvidia.com, damien.lemoal@opensource.wdc.com, naohiro.aota@wdc.com, jth@kernel.org, viro@zeniv.linux.org.uk Cc: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvme@lists.infradead.org, linux-fsdevel@vger.kernel.org, anuj20.g@samsung.com, joshi.k@samsung.com, p.raghav@samsung.com, nitheshshetty@gmail.com, gost.dev@samsung.com, Nitesh Shetty , Hannes Reinecke , =?utf-8?q?Javier_Gonz=C3=A1lez?= Subject: [PATCH v5 04/10] block: Introduce a new ioctl for copy Date: Wed, 23 Nov 2022 11:28:21 +0530 Message-Id: <20221123055827.26996-5-nj.shetty@samsung.com> X-Mailer: git-send-email 2.35.1.500.gb896f729e2 In-Reply-To: <20221123055827.26996-1-nj.shetty@samsung.com> MIME-Version: 1.0 X-Brightmail-Tracker: H4sIAAAAAAAAA01Te1BUZRT3u/fu3QWkLo/0A8PWTWuAeCws8EEQTVJewwhoDMUmXOEGDMvu ug/FiHFNGBaK58SjhQkSI0EH4o2LMLQGyCJSw4hCIFIwBQ5QQYPNytAuF8r/ft/vd875nXO+ OTzcvozrzEuWqhiFVCwRkNZE+01XVw9CnxHvPVTDQ43Gfhx9WriOo6tTBSQyDY/gqHupgoPG e69j6MalYgzVXe3DUNfXf2Lo18kVLurbWCTRzOoEgYoNYwDN3dVhqHvCHd3oHiTQqL6SRFW1 c1xUNNDCQZ2zFwBqN1XhaOWbTC5qeLRMoFsTe9DI+gDndSdaNz1M0td1U1x65EETQY8Oq+nm +hySbrl8nu4a15B03sUlc0DWNIde7rlL0vmt9YBuGUqnV5r30tm9n2F08+wiFvlsbEpwEiNO YBR8RhovS0iWJoYIwt+LOxjn5+8t9BAGogABXypOZUIEYUciPd5Klpi3IeCfEUvUZipSrFQK vF4LVsjUKoafJFOqQgSMPEEiF8k9leJUpVqa6CllVEFCb28fP3PgyZSk9r+HCPkTQdpjTS2u AYbnc4EVD1IiuFZzh8wF1jx7qgvAS6UlmEWwp/4CUHtHxgorAJbd1+LbGdfmezmsoAdw8OFF gn1kYbBq/gnIBTweSbnDoQ2ehXek8jGo7erdzMYpEwZLixwt2IEKhf2azE07gjoAtTO3CAu2 pYKgVnt7sw6kvGDBtJ2FtqJehbd/0mNsiB0c/HKWYEu+AC+2VeAWL0gZraB2NX+r0zA4W2Ak WOwAFwZauSx2hitL3SSLz8K6L66QbHImgLp7OsAKoTDLWIBbmsApV9io92JpF1hibMBY42dg nmkWY3lb2PnVNn4RXmus3qrvBMfWLmxhGtZX9gJ2WfkAlmRPcAoBX/fUQLqnBtL9b10N8Hrg xMiVqYmM0k/uK2XO/vfL8bLUZrB5IW7hneCXh394GgDGAwYAebjA0fb84U/i7W0TxOc+ZhSy OIVawigNwM+88CLc+bl4mfnEpKo4oSjQW+Tv7y8K9PUXCnbb1pS7xdtTiWIVk8IwckaxnYfx rJw1mI21qS1A+q20Ijpncj5MgrdVlx1f/v5+5ZmpkOb0mFe847wiPgj4cMFxo/Yot/xYsUPq jCHaVUuO+xJ9wTYdQL+jiZJk7dh1VLQ/9tAV3/Bj8u9gg9Ok+9wB9O7l+vAHXM97b7u877Pb 5UgA3271x5bowkGfxQr/feUny3RReWvUKbeIwIyqnj1MeOKhHyIzcsqjag0dMb9vRMR85LqU +MbLml39Eq3poElu021sHyrtK+4ZTXvJdmex2mQlHTsd+pvT/GMsrfXRm6cy3zlXNzx7eP1E UmjU56NNx9eYggXF6XRPzt5ofF/Qif1YxGRLz828ne4ipUNHyc81sZ3/zGePBGkEhDJJLHTD FUrxv4FABlOqBAAA X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFnrEIsWRmVeSWpSXmKPExsWy7bCSnG7Aztpkgw/TVS3WnzrGbNE04S+z xeq7/WwWv8+eZ7bY+242q8XNAzuZLPYsmsRksXL1USaL3Qs/Mlk8vvOZ3eLo/7dsFg+/3GKx mHToGqPF06uzmCz23tK22LP3JIvF5V1z2CzmL3vKbjHx+GZWix1PGhkttv2ez2zxeWkLu8W6 1+9ZLE7ckrY4//c4q4Okx6z7Z9k8ds66y+5x/t5GFo/LZ0s9Nq3qZPPYvKTeY/fNBjaP3uZ3 QAWt91k93u+7yubRt2UVo8fm09UenzfJebQf6Gby2PTkLVMAfxSXTUpqTmZZapG+XQJXxrav p1kK/ihV/GhYxtzAeEimi5GTQ0LARGLNywOsILaQwA5GiRmPBSDikhLL/h5hhrCFJVb+e87e xcgFVNPMJPHswCLGLkYODjYBbYnT/zlA4iICC5gkLt97xQziMAu0M0t8mbsCrFtYwF7iWEML E4jNIqAq0fHwBAuIzStgJdHRcQZskISAvkT/fUGQMKeAtcSZi7uYQMJCQCV7lulAVAtKnJz5 hAUkzCygLrF+nhBImFlAXqJ562zmCYyCs5BUzUKomoWkagEj8ypGydSC4tz03GLDAqO81HK9 4sTc4tK8dL3k/NxNjOBkoKW1g3HPqg96hxiZOBgPMUpwMCuJ8NZ71iQL8aYkVlalFuXHF5Xm pBYfYpTmYFES573QdTJeSCA9sSQ1OzW1ILUIJsvEwSnVwJQRt4P31NmVVg385ebXH9RNuh0q fbN0y5cz0We92IIXMbIc7Y8oVGk/K3Gh87DslpkPJ6x+snL9lRzrBR4b66XZpvF/2PhIXfxO pM0USe/z+Yr6SyRmb1A4G62UUrnC1jd855nV4k9DlDZ4zpiq59wSsui6f+zKQ3vn23MY7Kr8 v/LmkuYsYc/wdbw5jye5O8g9TA3IZ18VU3o8VEX0z4RrFhsE/+/uWpRd/t+X59ZGz0v8UwVj xPh3ZrpGufRlnxLvW7RYwvP91t7lxfOzi38qTWPbtnEtw4kbrFVv43aozf108k3+FFmmwwGi R6Kbmr5z8nNceCpReTrraEyXzJ31fmeWTMgNetcRnt1lM1OJpTgj0VCLuag4EQDA19x3dQMA AA== X-CMS-MailID: 20221123061024epcas5p28fd0296018950d722b5a97e2875cf391 X-Msg-Generator: CA X-Sendblock-Type: REQ_APPROVE CMS-TYPE: 105P DLP-Filter: Pass X-CFilter-Loop: Reflected X-CMS-RootMailID: 20221123061024epcas5p28fd0296018950d722b5a97e2875cf391 References: <20221123055827.26996-1-nj.shetty@samsung.com> X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED, RCVD_IN_MSPIKE_H3,RCVD_IN_MSPIKE_WL,SPF_HELO_PASS,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1750266479817371770?= X-GMAIL-MSGID: =?utf-8?q?1750266479817371770?= 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) MAX_COPY_NR_RANGE, limits the number of entries for the IOCTL and MAX_COPY_TOTAL_LENGTH limits the total copy length, IOCTL can handle. Example code, to issue BLKCOPY: /* Sample example to copy three entries with [dest,src,len], * [32768, 0, 4096] [36864, 4096, 4096] [40960,8192,4096] on same device */ int main(void) { int i, ret, fd; unsigned long src = 0, dst = 32768, len = 4096; struct copy_range *cr; cr = (struct copy_range *)malloc(sizeof(*cr)+ (sizeof(struct range_entry)*3)); cr->nr_range = 3; cr->reserved = 0; for (i = 0; i< cr->nr_range; i++, src += len, dst += len) { cr->ranges[i].dst = dst; cr->ranges[i].src = src; cr->ranges[i].len = len; cr->ranges[i].comp_len = 0; } fd = open("/dev/nvme0n1", O_RDWR); if (fd < 0) return 1; ret = ioctl(fd, BLKCOPY, cr); if (ret != 0) printf("copy failed, ret= %d\n", ret); for (i=0; i< cr->nr_range; i++) if (cr->ranges[i].len != cr->ranges[i].comp_len) printf("Partial copy for entry %d: requested %llu, completed %llu\n", i, cr->ranges[i].len, cr->ranges[i].comp_len); close(fd); free(cr); return ret; } Reviewed-by: Hannes Reinecke Signed-off-by: Nitesh Shetty Signed-off-by: Javier González Signed-off-by: Anuj Gupta --- block/ioctl.c | 36 ++++++++++++++++++++++++++++++++++++ include/uapi/linux/fs.h | 9 +++++++++ 2 files changed, 45 insertions(+) diff --git a/block/ioctl.c b/block/ioctl.c index 60121e89052b..7daf76199161 100644 --- a/block/ioctl.c +++ b/block/ioctl.c @@ -120,6 +120,40 @@ 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 ucopy_range, *kcopy_range = NULL; + size_t payload_size = 0; + int ret; + + if (!(mode & FMODE_WRITE)) + return -EBADF; + + if (copy_from_user(&ucopy_range, (void __user *)arg, + sizeof(ucopy_range))) + return -EFAULT; + + if (unlikely(!ucopy_range.nr_range || ucopy_range.reserved || + ucopy_range.nr_range >= MAX_COPY_NR_RANGE)) + return -EINVAL; + + payload_size = (ucopy_range.nr_range * sizeof(struct range_entry)) + + sizeof(ucopy_range); + + kcopy_range = memdup_user((void __user *)arg, payload_size); + if (IS_ERR(kcopy_range)) + return PTR_ERR(kcopy_range); + + ret = blkdev_issue_copy(bdev, bdev, kcopy_range->ranges, + kcopy_range->nr_range, NULL, NULL, GFP_KERNEL); + if (copy_to_user((void __user *)arg, kcopy_range, payload_size)) + ret = -EFAULT; + + kfree(kcopy_range); + return ret; +} + static int blk_ioctl_secure_erase(struct block_device *bdev, fmode_t mode, void __user *argp) { @@ -481,6 +515,8 @@ static int blkdev_common_ioctl(struct block_device *bdev, fmode_t mode, return blk_ioctl_discard(bdev, mode, arg); case BLKSECDISCARD: return blk_ioctl_secure_erase(bdev, mode, argp); + 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 9248b6d259de..8af10b926a6f 100644 --- a/include/uapi/linux/fs.h +++ b/include/uapi/linux/fs.h @@ -82,6 +82,14 @@ struct range_entry { __u64 comp_len; }; +struct copy_range { + __u64 nr_range; + __u64 reserved; + + /* Ranges always must be at the end */ + struct range_entry ranges[]; +}; + /* extent-same (dedupe) ioctls; these MUST match the btrfs ioctl definitions */ #define FILE_DEDUPE_RANGE_SAME 0 #define FILE_DEDUPE_RANGE_DIFFERS 1 @@ -203,6 +211,7 @@ 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)