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green245.sa.corp.samsungelectronics.net (unknown [107.99.41.245]) by epsmtip2.samsung.com (KnoxPortal) with ESMTPA id 20231222062143epsmtip29f2629f9af58673581da4b45db15f459~jEx3wdbaS0362603626epsmtip2P; Fri, 22 Dec 2023 06:21:43 +0000 (GMT) From: Nitesh Shetty To: Jens Axboe , Jonathan Corbet , Alasdair Kergon , Mike Snitzer , Mikulas Patocka , dm-devel@lists.linux.dev, Keith Busch , Christoph Hellwig , Sagi Grimberg , Chaitanya Kulkarni , Alexander Viro , Christian Brauner Cc: martin.petersen@oracle.com, linux-scsi@vger.kernel.org, nitheshshetty@gmail.com, anuj1072538@gmail.com, gost.dev@samsung.com, mcgrof@kernel.org, Nitesh Shetty , Hannes Reinecke , Anuj Gupta , linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-nvme@lists.infradead.org, linux-fsdevel@vger.kernel.org Subject: [PATCH v19 06/12] fs, block: copy_file_range for def_blk_ops for direct block device Date: Fri, 22 Dec 2023 11:43:00 +0530 Message-Id: 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J6ey0mRxIp/0JWrv8ecuGhWcYpcUORGqtj3A0eDQGIFOqNw4uu7MJdHne18B6mnJBuhyWSmB OlvuYKihLA9DldfvYyjP/Bwgl0ONocauMHTldDmBGhqtBLLfLSGRRuvyRude1JGowjKBoZcq F0AXzjgwVNdzHKDaMQ2Obn0eINDDrpmo3W3xWhvE3FE7vZn27tsEY38sZ3RVZ0lGX36M+aAv Akx9ZxbJXM3J92LOK/pJZtDVRTADTQ6SyTFUAUbfdpT5ppvD6Hr6sO1+u31XxbKJ+w+x0sVr 9vomNPd1EJJ6vzR70+osYJmqBD4UpJfCgfdGXAl8KS5dD6DJ8chrEgRCrbsVn8w8WDnR6z0p KTA4PnbpN6Aokg6DbT8pT+9P1+Hwx00F5hnA6Rs4NJRyPA6PjobvtCJPTdAhcKjhCenJHHoF bG794u1RIL0Y5r6e7ql96JWwd/TqnxO4vxVrr/6vPh1ai3qIye1zocJYjKsArf4Pqf9DlwFW BQJZiSwpPmmfUCJMZg+Hy8RJMnlyfPi+lCQd+PN0QWgd6NZMhJsBRgEzgBTO9+ekLDzJcjmx 4iPprDQlRipPZGVmMJMi+DM4wovFsVw6XpzKHmBZCSv9RzHKJygLU/OqQ3abm/tWlnUctOnc ji2qYHdIxUiL5YC9MmbKsqcFG2rfpJovaoNfFWTGjkYN+y2/YQ5N31E4Q3Nf1FWSLR2xuXjP OGEBTTtFkraATy+pdKOrtdqoBLPdq05bC53guWBPBs+Urr40zdQWudWl9P8umjWqWT8vxzmh wq8dFa1Tx+/KN7QSmzvtt2SFJeMWXKN8ckUyRZC/LaO21zAsLx04F2yy2R9EhibO2RW0KUT7 vYK7jdvuFRe9MebN9rfCoULzx+Vu+jEZV6Oe/yg6Yrg/A1Z0K2wBCYbxExEf7taU57zO3dO4 OZcwRfkZ5TWzbbR2xBo1lLkAT9Ov4ROyBLFQgEtl4l80qWJJYwMAAA== X-CMS-MailID: 20231222062147epcas5p4353805c045bac87c459f488d0f5b8c86 X-Msg-Generator: CA X-Sendblock-Type: REQ_APPROVE CMS-TYPE: 105P DLP-Filter: Pass X-CFilter-Loop: Reflected X-CMS-RootMailID: 20231222062147epcas5p4353805c045bac87c459f488d0f5b8c86 References: <20231222061313.12260-1-nj.shetty@samsung.com> For direct block device opened with O_DIRECT, use copy_file_range to issue device copy offload, or use generic_copy_file_range in case device copy offload capability is absent or the device files are not open with O_DIRECT. Reviewed-by: Hannes Reinecke Signed-off-by: Anuj Gupta Signed-off-by: Nitesh Shetty --- block/fops.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/block/fops.c b/block/fops.c index 0abaac705daf..6ca46ea1f358 100644 --- a/block/fops.c +++ b/block/fops.c @@ -747,6 +747,30 @@ static ssize_t blkdev_read_iter(struct kiocb *iocb, struct iov_iter *to) return ret; } +static ssize_t blkdev_copy_file_range(struct file *file_in, loff_t pos_in, + struct file *file_out, loff_t pos_out, + size_t len, unsigned int flags) +{ + struct block_device *in_bdev = I_BDEV(bdev_file_inode(file_in)); + struct block_device *out_bdev = I_BDEV(bdev_file_inode(file_out)); + ssize_t copied = 0; + + if ((in_bdev == out_bdev) && bdev_max_copy_sectors(in_bdev) && + (file_in->f_iocb_flags & IOCB_DIRECT) && + (file_out->f_iocb_flags & IOCB_DIRECT)) { + copied = blkdev_copy_offload(in_bdev, pos_in, pos_out, len, + NULL, NULL, GFP_KERNEL); + if (copied < 0) + copied = 0; + } else { + copied = generic_copy_file_range(file_in, pos_in + copied, + file_out, pos_out + copied, + len - copied, flags); + } + + return copied; +} + #define BLKDEV_FALLOC_FL_SUPPORTED \ (FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE | \ FALLOC_FL_ZERO_RANGE | FALLOC_FL_NO_HIDE_STALE) @@ -851,6 +875,7 @@ const struct file_operations def_blk_fops = { .splice_read = filemap_splice_read, .splice_write = iter_file_splice_write, .fallocate = blkdev_fallocate, + .copy_file_range = blkdev_copy_file_range, }; static __init int blkdev_init(void)