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Wed, 27 Apr 2022 22:08:24 +0900 (KST) Received: from test-zns (unknown [107.110.206.5]) by epsmtip2.samsung.com (KnoxPortal) with ESMTPA id 20220427130823epsmtip2faace445336901ad6bad32c4c8c06a3d~pwsghFvIJ1516015160epsmtip2s; Wed, 27 Apr 2022 13:08:23 +0000 (GMT) Date: Wed, 27 Apr 2022 18:33:15 +0530 From: Nitesh Shetty To: Damien Le Moal Cc: linux-block@vger.kernel.org, linux-scsi@vger.kernel.org, dm-devel@redhat.com, linux-nvme@lists.infradead.org, linux-fsdevel@vger.kernel.org, nitheshshetty@gmail.com, linux-kernel@vger.kernel.org Subject: Re: [PATCH v4 03/10] block: Introduce a new ioctl for copy Message-ID: <20220427130315.GB9558@test-zns> MIME-Version: 1.0 In-Reply-To: <513edc25-1c73-6c85-9a50-0e267a106ec0@opensource.wdc.com> User-Agent: Mutt/1.9.4 (2018-02-28) X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrAJsWRmVeSWpSXmKPExsWy7bCmlu7K4Mwkg83dbBa/z55nttj7bjar xd5b2hZ79p5ksbi8aw6bxfxlT9ktuq/vYLPY8aSR0YHDY+esu+wem5fUe+xsvc/q8X7fVTaP z5vkAlijsm0yUhNTUosUUvOS81My89JtlbyD453jTc0MDHUNLS3MlRTyEnNTbZVcfAJ03TJz gC5RUihLzCkFCgUkFhcr6dvZFOWXlqQqZOQXl9gqpRak5BSYFOgVJ+YWl+al6+WlllgZGhgY mQIVJmRnbOndwFrwUrBiw71fjA2MLXxdjJwcEgImEkv3zWDtYuTiEBLYzSjRvXYulPOJUeLs wd9sEM43RomWxYcYYVpWX5sKVbWXUaK1+zhU1TNGieM7vrGDVLEIqEr0LF8AlODgYBPQljj9 nwMkLCJgKvG2p5UFpJ5Z4AyjRPv7XWD1wgLOEv0XbzOD2LwCOhJ7D2xlg7AFJU7OfMICYnMK uElMPbaRCcQWFVCWOLDtOBPIIAmBVg6J91P2sUOc5yKx/Np3NghbWOLV8S1QcSmJl/1tUHa5 xPa2BVDNLYwSXadOsUAk7CUu7vkLtoFZIEPiZP8TqEGyElNPrYOK80n0/n7CBBHnldgxD8ZW llizfgFUvaTEte+NULaHxJ9fkLATEvjNKHFuecQERvlZSJ6bhWQdhK0jsWD3JyCbA8iWllj+ jwPC1JRYv0t/ASPrKkbJ1ILi3PTUYtMCw7zUcniUJ+fnbmIEJ1Utzx2Mdx980DvEyMTBeIhR goNZSYT3y+6MJCHelMTKqtSi/Pii0pzU4kOMpsDImsgsJZqcD0zreSXxhiaWBiZmZmYmlsZm hkrivKfTNyQKCaQnlqRmp6YWpBbB9DFxcEo1MDHuZMtnCveS5dyplbLtQ6yT1cyrqp+jNV78 td50UtihS2znQbNss6ct9y5WSj7h4r/YvvP4l4mq586arxDgNPK0nbt2++XpMSyzTzCcP7bl 5Ga9AMnSCYdmflilkdHO6ZLZYi2mdeBXw/qNYccOMUeXMonf3vhNMHH187VXs/esU5gVdm+R QH7+vZSl3Et/rs9sdvogqivX0XT8L7/GDZcT0a5aIZtfbT5d3nVm9QtZWSuWxw7PjrLxsXB6 ZAepV1oo5Jr3P3lwnr2ghq1ZxsBld7Y03/5b/IwP31969ER6+s043U+n6j5ylorx68Wd7luj tu5F4JUE58n38kyZ060niWXO15t/W6h4z12VDCWW4oxEQy3mouJEAIGbFNYzBAAA X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFnrALMWRmVeSWpSXmKPExsWy7bCSvK6HQ2aSwaIl0ha/z55nttj7bjar xd5b2hZ79p5ksbi8aw6bxfxlT9ktuq/vYLPY8aSR0YHDY+esu+wem5fUe+xsvc/q8X7fVTaP z5vkAlijuGxSUnMyy1KL9O0SuDKaL3IXrOSv2LThL2MD413uLkZODgkBE4nV16aydjFycQgJ 7GaUeHP7DSNEQlJi2d8jzBC2sMTKf8/ZIYqeMEo03poDlmARUJXoWb6ArYuRg4NNQFvi9H8O kLCIgKnE255WFpB6ZoEzjBLt73exgySEBZwl+i/eBuvlFdCR2HtgKxvE0N+MEkveTmaFSAhK nJz5hAXEZhbQkrjx7yUTyAJmAWmJ5f/AFnAKuElMPbaRCcQWFVCWOLDtONMERsFZSLpnIeme hdC9gJF5FaNkakFxbnpusWGBYV5quV5xYm5xaV66XnJ+7iZGcCRoae5g3L7qg94hRiYOxkOM EhzMSiK8X3ZnJAnxpiRWVqUW5ccXleakFh9ilOZgURLnvdB1Ml5IID2xJDU7NbUgtQgmy8TB KdXAdHDXNQfr76ea8g6xxHUXtj65+s76sFXCrNy02EbZflWt4s8m8WmWhQxPPdznWvr0qJo5 Zdl8rf1zY1c1R/y1JZ82m/OuXpJrPi9hS23woU4/0/Lo1nXzLrLdWXPw+pSD+Rk7bu3XYXDP P6ZzU9qc1UTn5oMFWsuZp9vy5K7NW5w8V/286MKagv+9svKreO4v+lszVWWhb+8WvuP+G3Ym nG8q/h5b8l38wV/NvALj/cZTT3quXejR71hYe6g79UiOzdrSezVVklPsvNUmu2qEVNfYPZ/y ovWVfEzu76ojTfskD5v4KDZznLvU9rdpsWa19anSOSXHvrBI9QcbR2+MCWdc7zc5J/o8m5/l pjQlluKMREMt5qLiRACj4ob+8wIAAA== X-CMS-MailID: 20220427130824epcas5p38594effe1d648be050ff00284e115014 X-Msg-Generator: CA Content-Type: multipart/mixed; boundary="----s9reHD3dvq.Swzu4OgS99nNlXP7CLa0djtt04wdzZepsPVyA=_17950_" X-Sendblock-Type: REQ_APPROVE CMS-TYPE: 105P DLP-Filter: Pass X-CFilter-Loop: Reflected X-CMS-RootMailID: 20220426101938epcas5p291690dd1f0e931cd9f8139daaf3f9296 References: <20220426101241.30100-1-nj.shetty@samsung.com> <20220426101241.30100-4-nj.shetty@samsung.com> <513edc25-1c73-6c85-9a50-0e267a106ec0@opensource.wdc.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220427_073116_935057_0E696747 X-CRM114-Status: GOOD ( 21.20 ) X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org ------s9reHD3dvq.Swzu4OgS99nNlXP7CLa0djtt04wdzZepsPVyA=_17950_ Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline O Wed, Apr 27, 2022 at 11:48:57AM +0900, Damien Le Moal wrote: > On 4/26/22 19:12, Nitesh Shetty wrote: > > 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->range_list[i].dst = dst; > > cr->range_list[i].src = src; > > cr->range_list[i].len = len; > > cr->range_list[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->range_list[i].len != cr->range_list[i].comp_len) > > printf("Partial copy for entry %d: requested %llu, completed %llu\n", > > i, cr->range_list[i].len, > > cr->range_list[i].comp_len); > > close(fd); > > free(cr); > > return ret; > > } > > Nice to have a code example. But please format it correctly. > acked -- Nitesh Shetty ------s9reHD3dvq.Swzu4OgS99nNlXP7CLa0djtt04wdzZepsPVyA=_17950_ Content-Type: text/plain; charset="utf-8" ------s9reHD3dvq.Swzu4OgS99nNlXP7CLa0djtt04wdzZepsPVyA=_17950_--