From: Christoph Hellwig <hch@infradead.org>
To: Dongsu Park <dongsu.park@profitbricks.com>
Cc: linux-kernel@vger.kernel.org, Jens Axboe <axboe@kernel.dk>,
Kent Overstreet <kmo@daterainc.com>, Ming Lin <mlin@minggr.net>,
Al Viro <viro@zeniv.linux.org.uk>
Subject: Re: [RFC PATCH 08/17] block: refactor __bio_copy_iov()
Date: Tue, 23 Dec 2014 02:45:51 -0800 [thread overview]
Message-ID: <20141223104551.GC27600@infradead.org> (raw)
In-Reply-To: <0b6ba533a64aec98e8447bfd30c6622d0729d12e.1419241597.git.dongsu.park@profitbricks.com>
> static int __bio_copy_iov(struct bio *bio, const struct iov_iter *iter,
> + int to_iov)
> {
> + int i;
> struct bio_vec *bvec;
> struct iov_iter iov_iter = *iter;
Why not pass the iov_iter by value?
> bio_for_each_segment_all(bvec, bio, i) {
> + ssize_t ret;
> +
> + if (to_iov == WRITE)
> + ret = copy_page_to_iter(bvec->bv_page,
> + bvec->bv_offset,
> + bvec->bv_len,
> + &iov_iter);
> + else
> + ret = copy_page_from_iter(bvec->bv_page,
> + bvec->bv_offset,
> + bvec->bv_len,
> + &iov_iter);
> +
> + if (!iov_iter_count(&iov_iter))
> + break;
>
> + if (ret < bvec->bv_len)
> + return -EFAULT;
> }
>
> + return 0;
Seems like this should be split into two functions for the read
and write cases?
next prev parent reply other threads:[~2014-12-23 10:45 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-22 11:48 [RFC PATCH 00/17] simplify block layer based on immutable biovecs Dongsu Park
2014-12-22 11:48 ` [RFC PATCH 01/17] block: make generic_make_request handle arbitrarily sized bios Dongsu Park
2014-12-23 10:16 ` Christoph Hellwig
2014-12-23 11:41 ` Dongsu Park
2014-12-27 15:02 ` Christoph Hellwig
2014-12-23 19:14 ` Geoff Levand
2014-12-24 10:37 ` Dongsu Park
2014-12-25 6:09 ` Ming Lei
2014-12-22 11:48 ` [RFC PATCH 02/17] block: simplify bio_add_page() Dongsu Park
2014-12-23 10:22 ` Christoph Hellwig
2014-12-23 11:46 ` Dongsu Park
2014-12-22 11:48 ` [RFC PATCH 03/17] block: simplify issueing discard, write_same, zeroout Dongsu Park
2014-12-23 10:23 ` Christoph Hellwig
2014-12-22 11:48 ` [RFC PATCH 04/17] bcache: clean up hacks around bio_split_pool Dongsu Park
2014-12-22 11:48 ` [RFC PATCH 05/17] btrfs: remove bio splitting and merge_bvec_fn() calls Dongsu Park
[not found] ` <e4b7b017eaa81784889ebb2a4e6a7d4366adf13a.1419241597.git.dongsu.park@profit bricks.com>
2014-12-23 14:44 ` Chris Mason
2014-12-22 11:48 ` [RFC PATCH 06/17] btrfs: make use of immutable biovecs Dongsu Park
2014-12-23 10:35 ` Christoph Hellwig
2014-12-23 12:09 ` Dongsu Park
2014-12-22 11:48 ` [RFC PATCH 07/17] block: replace sg_iovec with iov_iter Dongsu Park
2014-12-23 10:44 ` Christoph Hellwig
2014-12-23 12:18 ` Dongsu Park
2014-12-27 15:03 ` Christoph Hellwig
2014-12-22 11:48 ` [RFC PATCH 08/17] block: refactor __bio_copy_iov() Dongsu Park
2014-12-23 10:45 ` Christoph Hellwig [this message]
2014-12-23 12:24 ` Dongsu Park
2014-12-22 11:48 ` [RFC PATCH 09/17] block: refactor iov_count_pages() from bio_{copy,map}_user_iov() Dongsu Park
2014-12-22 11:48 ` [RFC PATCH 10/17] block: refactor bio_get_user_pages() from __bio_map_user_iov() Dongsu Park
2014-12-22 11:48 ` [RFC PATCH 11/17] block: allow __blk_queue_bounce() to handle bios larger than BIO_MAX_PAGES Dongsu Park
2014-12-22 11:48 ` [RFC PATCH 12/17] md/raid10: make sync_request_write() call bio_copy_data() Dongsu Park
2014-12-23 10:48 ` Christoph Hellwig
2014-12-23 12:31 ` Dongsu Park
2014-12-22 11:48 ` [RFC PATCH 13/17] md/raid5: get rid of bio_fits_rdev() Dongsu Park
2014-12-22 11:48 ` [RFC PATCH 14/17] block: kill merge_bvec_fn() completely Dongsu Park
2014-12-22 11:48 ` [RFC PATCH 15/17] fs: use helper bio_add_page() instead of open coding on bi_io_vec Dongsu Park
2014-12-22 15:22 ` Dave Kleikamp
2014-12-22 11:48 ` [RFC PATCH 16/17] fs: convert buffer head etc. to use immutable biovecs API Dongsu Park
2014-12-23 10:51 ` Christoph Hellwig
2014-12-23 12:33 ` Dongsu Park
2014-12-22 11:48 ` [RFC PATCH 17/17] Documentation: update notes in biovecs about arbitrarily sized bios Dongsu Park
2014-12-23 10:52 ` Christoph Hellwig
2014-12-23 12:34 ` Dongsu Park
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20141223104551.GC27600@infradead.org \
--to=hch@infradead.org \
--cc=axboe@kernel.dk \
--cc=dongsu.park@profitbricks.com \
--cc=kmo@daterainc.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mlin@minggr.net \
--cc=viro@zeniv.linux.org.uk \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox