From: Ming Lei <ming.lei@canonical.com> To: Jens Axboe <axboe@fb.com>, linux-kernel@vger.kernel.org Cc: linux-block@vger.kernel.org, Christoph Hellwig <hch@infradead.org>, Al Viro <viro@zeniv.linux.org.uk>, Anton Altaparmakov <anton@tuxera.com>, xfs@oss.sgi.com, Dave Chinner <david@fromorbit.com>, drbd-dev@lists.linbit.com, Philipp Reisner <philipp.reisner@linbit.com>, Lars Ellenberg <lars.ellenberg@linbit.com>, Boaz Harrosh <boaz@plexistor.com>, Ming Lei <ming.lei@canonical.com> Subject: [PATCH v2 1/8] block: move bvec iterator into include/linux/bvec.h Date: Mon, 4 Apr 2016 00:31:02 +0800 [thread overview] Message-ID: <1459701069-31406-2-git-send-email-ming.lei@canonical.com> (raw) In-Reply-To: <1459701069-31406-1-git-send-email-ming.lei@canonical.com> bvec iterator helpers should be used to implement by iterate_bvec():lib/iov_iter.c too, and move them into one header, so that we can keep bvec iterator header out of CONFIG_BLOCK. Then we can remove the reinventing of wheel in iterate_bvec(). Signed-off-by: Ming Lei <ming.lei@canonical.com> --- include/linux/bio.h | 51 +----------------------------------- include/linux/bvec.h | 74 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 75 insertions(+), 50 deletions(-) create mode 100644 include/linux/bvec.h diff --git a/include/linux/bio.h b/include/linux/bio.h index 88bc64f..78cf737 100644 --- a/include/linux/bio.h +++ b/include/linux/bio.h @@ -31,6 +31,7 @@ /* struct bio, bio_vec and BIO_* flags are defined in blk_types.h */ #include <linux/blk_types.h> +#include <linux/bvec.h> #define BIO_DEBUG @@ -57,29 +58,6 @@ (bio)->bi_rw |= ((unsigned long) (prio) << BIO_PRIO_SHIFT); \ } while (0) -/* - * various member access, note that bio_data should of course not be used - * on highmem page vectors - */ -#define __bvec_iter_bvec(bvec, iter) (&(bvec)[(iter).bi_idx]) - -#define bvec_iter_page(bvec, iter) \ - (__bvec_iter_bvec((bvec), (iter))->bv_page) - -#define bvec_iter_len(bvec, iter) \ - min((iter).bi_size, \ - __bvec_iter_bvec((bvec), (iter))->bv_len - (iter).bi_bvec_done) - -#define bvec_iter_offset(bvec, iter) \ - (__bvec_iter_bvec((bvec), (iter))->bv_offset + (iter).bi_bvec_done) - -#define bvec_iter_bvec(bvec, iter) \ -((struct bio_vec) { \ - .bv_page = bvec_iter_page((bvec), (iter)), \ - .bv_len = bvec_iter_len((bvec), (iter)), \ - .bv_offset = bvec_iter_offset((bvec), (iter)), \ -}) - #define bio_iter_iovec(bio, iter) \ bvec_iter_bvec((bio)->bi_io_vec, (iter)) @@ -193,33 +171,6 @@ static inline void *bio_data(struct bio *bio) #define bio_for_each_segment_all(bvl, bio, i) \ for (i = 0, bvl = (bio)->bi_io_vec; i < (bio)->bi_vcnt; i++, bvl++) -static inline void bvec_iter_advance(struct bio_vec *bv, struct bvec_iter *iter, - unsigned bytes) -{ - WARN_ONCE(bytes > iter->bi_size, - "Attempted to advance past end of bvec iter\n"); - - while (bytes) { - unsigned len = min(bytes, bvec_iter_len(bv, *iter)); - - bytes -= len; - iter->bi_size -= len; - iter->bi_bvec_done += len; - - if (iter->bi_bvec_done == __bvec_iter_bvec(bv, *iter)->bv_len) { - iter->bi_bvec_done = 0; - iter->bi_idx++; - } - } -} - -#define for_each_bvec(bvl, bio_vec, iter, start) \ - for (iter = (start); \ - (iter).bi_size && \ - ((bvl = bvec_iter_bvec((bio_vec), (iter))), 1); \ - bvec_iter_advance((bio_vec), &(iter), (bvl).bv_len)) - - static inline void bio_advance_iter(struct bio *bio, struct bvec_iter *iter, unsigned bytes) { diff --git a/include/linux/bvec.h b/include/linux/bvec.h new file mode 100644 index 0000000..29c459d --- /dev/null +++ b/include/linux/bvec.h @@ -0,0 +1,74 @@ +/* + * bvec iterator + * + * Copyright (C) 2001 Ming Lei <ming.lei@canonical.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public Licens + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111- + */ +#ifndef __LINUX_BVEC_ITER_H +#define __LINUX_BVEC_ITER_H + +#include <linux/blk_types.h> + +/* + * various member access, note that bio_data should of course not be used + * on highmem page vectors + */ +#define __bvec_iter_bvec(bvec, iter) (&(bvec)[(iter).bi_idx]) + +#define bvec_iter_page(bvec, iter) \ + (__bvec_iter_bvec((bvec), (iter))->bv_page) + +#define bvec_iter_len(bvec, iter) \ + min((iter).bi_size, \ + __bvec_iter_bvec((bvec), (iter))->bv_len - (iter).bi_bvec_done) + +#define bvec_iter_offset(bvec, iter) \ + (__bvec_iter_bvec((bvec), (iter))->bv_offset + (iter).bi_bvec_done) + +#define bvec_iter_bvec(bvec, iter) \ +((struct bio_vec) { \ + .bv_page = bvec_iter_page((bvec), (iter)), \ + .bv_len = bvec_iter_len((bvec), (iter)), \ + .bv_offset = bvec_iter_offset((bvec), (iter)), \ +}) + +static inline void bvec_iter_advance(struct bio_vec *bv, struct bvec_iter *iter, + unsigned bytes) +{ + WARN_ONCE(bytes > iter->bi_size, + "Attempted to advance past end of bvec iter\n"); + + while (bytes) { + unsigned len = min(bytes, bvec_iter_len(bv, *iter)); + + bytes -= len; + iter->bi_size -= len; + iter->bi_bvec_done += len; + + if (iter->bi_bvec_done == __bvec_iter_bvec(bv, *iter)->bv_len) { + iter->bi_bvec_done = 0; + iter->bi_idx++; + } + } +} + +#define for_each_bvec(bvl, bio_vec, iter, start) \ + for (iter = (start); \ + (iter).bi_size && \ + ((bvl = bvec_iter_bvec((bio_vec), (iter))), 1); \ + bvec_iter_advance((bio_vec), &(iter), (bvl).bv_len)) + +#endif /* __LINUX_BVEC_ITER_H */ -- 1.9.1
WARNING: multiple messages have this Message-ID (diff)
From: Ming Lei <ming.lei@canonical.com> To: Jens Axboe <axboe@fb.com>, linux-kernel@vger.kernel.org Cc: Christoph Hellwig <hch@infradead.org>, Boaz Harrosh <boaz@plexistor.com>, Ming Lei <ming.lei@canonical.com>, Philipp Reisner <philipp.reisner@linbit.com>, xfs@oss.sgi.com, linux-block@vger.kernel.org, Al Viro <viro@zeniv.linux.org.uk>, Lars Ellenberg <lars.ellenberg@linbit.com>, Anton Altaparmakov <anton@tuxera.com>, drbd-dev@lists.linbit.com Subject: [PATCH v2 1/8] block: move bvec iterator into include/linux/bvec.h Date: Mon, 4 Apr 2016 00:31:02 +0800 [thread overview] Message-ID: <1459701069-31406-2-git-send-email-ming.lei@canonical.com> (raw) In-Reply-To: <1459701069-31406-1-git-send-email-ming.lei@canonical.com> bvec iterator helpers should be used to implement by iterate_bvec():lib/iov_iter.c too, and move them into one header, so that we can keep bvec iterator header out of CONFIG_BLOCK. Then we can remove the reinventing of wheel in iterate_bvec(). Signed-off-by: Ming Lei <ming.lei@canonical.com> --- include/linux/bio.h | 51 +----------------------------------- include/linux/bvec.h | 74 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 75 insertions(+), 50 deletions(-) create mode 100644 include/linux/bvec.h diff --git a/include/linux/bio.h b/include/linux/bio.h index 88bc64f..78cf737 100644 --- a/include/linux/bio.h +++ b/include/linux/bio.h @@ -31,6 +31,7 @@ /* struct bio, bio_vec and BIO_* flags are defined in blk_types.h */ #include <linux/blk_types.h> +#include <linux/bvec.h> #define BIO_DEBUG @@ -57,29 +58,6 @@ (bio)->bi_rw |= ((unsigned long) (prio) << BIO_PRIO_SHIFT); \ } while (0) -/* - * various member access, note that bio_data should of course not be used - * on highmem page vectors - */ -#define __bvec_iter_bvec(bvec, iter) (&(bvec)[(iter).bi_idx]) - -#define bvec_iter_page(bvec, iter) \ - (__bvec_iter_bvec((bvec), (iter))->bv_page) - -#define bvec_iter_len(bvec, iter) \ - min((iter).bi_size, \ - __bvec_iter_bvec((bvec), (iter))->bv_len - (iter).bi_bvec_done) - -#define bvec_iter_offset(bvec, iter) \ - (__bvec_iter_bvec((bvec), (iter))->bv_offset + (iter).bi_bvec_done) - -#define bvec_iter_bvec(bvec, iter) \ -((struct bio_vec) { \ - .bv_page = bvec_iter_page((bvec), (iter)), \ - .bv_len = bvec_iter_len((bvec), (iter)), \ - .bv_offset = bvec_iter_offset((bvec), (iter)), \ -}) - #define bio_iter_iovec(bio, iter) \ bvec_iter_bvec((bio)->bi_io_vec, (iter)) @@ -193,33 +171,6 @@ static inline void *bio_data(struct bio *bio) #define bio_for_each_segment_all(bvl, bio, i) \ for (i = 0, bvl = (bio)->bi_io_vec; i < (bio)->bi_vcnt; i++, bvl++) -static inline void bvec_iter_advance(struct bio_vec *bv, struct bvec_iter *iter, - unsigned bytes) -{ - WARN_ONCE(bytes > iter->bi_size, - "Attempted to advance past end of bvec iter\n"); - - while (bytes) { - unsigned len = min(bytes, bvec_iter_len(bv, *iter)); - - bytes -= len; - iter->bi_size -= len; - iter->bi_bvec_done += len; - - if (iter->bi_bvec_done == __bvec_iter_bvec(bv, *iter)->bv_len) { - iter->bi_bvec_done = 0; - iter->bi_idx++; - } - } -} - -#define for_each_bvec(bvl, bio_vec, iter, start) \ - for (iter = (start); \ - (iter).bi_size && \ - ((bvl = bvec_iter_bvec((bio_vec), (iter))), 1); \ - bvec_iter_advance((bio_vec), &(iter), (bvl).bv_len)) - - static inline void bio_advance_iter(struct bio *bio, struct bvec_iter *iter, unsigned bytes) { diff --git a/include/linux/bvec.h b/include/linux/bvec.h new file mode 100644 index 0000000..29c459d --- /dev/null +++ b/include/linux/bvec.h @@ -0,0 +1,74 @@ +/* + * bvec iterator + * + * Copyright (C) 2001 Ming Lei <ming.lei@canonical.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public Licens + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111- + */ +#ifndef __LINUX_BVEC_ITER_H +#define __LINUX_BVEC_ITER_H + +#include <linux/blk_types.h> + +/* + * various member access, note that bio_data should of course not be used + * on highmem page vectors + */ +#define __bvec_iter_bvec(bvec, iter) (&(bvec)[(iter).bi_idx]) + +#define bvec_iter_page(bvec, iter) \ + (__bvec_iter_bvec((bvec), (iter))->bv_page) + +#define bvec_iter_len(bvec, iter) \ + min((iter).bi_size, \ + __bvec_iter_bvec((bvec), (iter))->bv_len - (iter).bi_bvec_done) + +#define bvec_iter_offset(bvec, iter) \ + (__bvec_iter_bvec((bvec), (iter))->bv_offset + (iter).bi_bvec_done) + +#define bvec_iter_bvec(bvec, iter) \ +((struct bio_vec) { \ + .bv_page = bvec_iter_page((bvec), (iter)), \ + .bv_len = bvec_iter_len((bvec), (iter)), \ + .bv_offset = bvec_iter_offset((bvec), (iter)), \ +}) + +static inline void bvec_iter_advance(struct bio_vec *bv, struct bvec_iter *iter, + unsigned bytes) +{ + WARN_ONCE(bytes > iter->bi_size, + "Attempted to advance past end of bvec iter\n"); + + while (bytes) { + unsigned len = min(bytes, bvec_iter_len(bv, *iter)); + + bytes -= len; + iter->bi_size -= len; + iter->bi_bvec_done += len; + + if (iter->bi_bvec_done == __bvec_iter_bvec(bv, *iter)->bv_len) { + iter->bi_bvec_done = 0; + iter->bi_idx++; + } + } +} + +#define for_each_bvec(bvl, bio_vec, iter, start) \ + for (iter = (start); \ + (iter).bi_size && \ + ((bvl = bvec_iter_bvec((bio_vec), (iter))), 1); \ + bvec_iter_advance((bio_vec), &(iter), (bvl).bv_len)) + +#endif /* __LINUX_BVEC_ITER_H */ -- 1.9.1 _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs
next prev parent reply other threads:[~2016-04-03 16:31 UTC|newest] Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top 2016-04-03 16:31 [PATCH v2 0/8] block: prepare for multipage bvecs Ming Lei 2016-04-03 16:31 ` Ming Lei 2016-04-03 16:31 ` Ming Lei [this message] 2016-04-03 16:31 ` [PATCH v2 1/8] block: move bvec iterator into include/linux/bvec.h Ming Lei 2016-04-03 16:31 ` [PATCH v2 2/8] block: move two bvec structure into bvec.h Ming Lei 2016-04-03 16:31 ` Ming Lei 2016-04-03 18:12 ` kbuild test robot 2016-04-03 18:12 ` kbuild test robot 2016-04-03 16:31 ` [PATCH v2 3/8] block: mark 1st parameter of bvec_iter_advance as const Ming Lei 2016-04-03 16:31 ` Ming Lei 2016-04-03 16:31 ` [PATCH v2 4/8] iov_iter: use bvec iterator to implement iterate_bvec() Ming Lei 2016-04-03 16:31 ` Ming Lei 2016-04-03 16:31 ` [PATCH v2 5/8] fs: xfs: replace BIO_MAX_SECTORS with BIO_MAX_PAGES Ming Lei 2016-04-03 16:31 ` Ming Lei 2016-04-03 16:31 ` [PATCH v2 6/8] block: bio: remove BIO_MAX_SECTORS Ming Lei 2016-04-03 16:31 ` Ming Lei
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