| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <20190724042518.14363-4-jhubbard@nvidia.com>
Date: Tue, 23 Jul 2019 21:25:09 -0700
From: john.hubbard@...il.com
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: Alexander Viro <viro@...iv.linux.org.uk>,
Anna Schumaker <anna.schumaker@...app.com>,
"David S . Miller" <davem@...emloft.net>,
Dominique Martinet <asmadeus@...ewreck.org>,
Eric Van Hensbergen <ericvh@...il.com>,
Jason Gunthorpe <jgg@...pe.ca>,
Jason Wang <jasowang@...hat.com>, Jens Axboe <axboe@...nel.dk>,
Latchesar Ionkov <lucho@...kov.net>,
"Michael S . Tsirkin" <mst@...hat.com>,
Miklos Szeredi <miklos@...redi.hu>,
Trond Myklebust <trond.myklebust@...merspace.com>,
Christoph Hellwig <hch@....de>,
Matthew Wilcox <willy@...radead.org>, linux-mm@...ck.org,
LKML <linux-kernel@...r.kernel.org>, ceph-devel@...r.kernel.org,
kvm@...r.kernel.org, linux-block@...r.kernel.org,
linux-cifs@...r.kernel.org, linux-fsdevel@...r.kernel.org,
linux-nfs@...r.kernel.org, linux-rdma@...r.kernel.org,
netdev@...r.kernel.org, samba-technical@...ts.samba.org,
v9fs-developer@...ts.sourceforge.net,
virtualization@...ts.linux-foundation.org,
John Hubbard <jhubbard@...dia.com>,
Christoph Hellwig <hch@...radead.org>,
Jérôme Glisse <jglisse@...hat.com>,
Minwoo Im <minwoo.im.dev@...il.com>
Subject: [PATCH 03/12] block: bio_release_pages: use flags arg instead of bool
From: John Hubbard <jhubbard@...dia.com>
In commit d241a95f3514 ("block: optionally mark pages dirty in
bio_release_pages"), new "bool mark_dirty" argument was added to
bio_release_pages.
In upcoming work, another bool argument (to indicate that the pages came
from get_user_pages) is going to be added. That's one bool too many,
because it's not desirable have calls of the form:
foo(true, false, true, etc);
In order to prepare for that, change the argument from a bool, to a
typesafe (enum-based) flags argument.
Cc: Christoph Hellwig <hch@...radead.org>
Cc: Jérôme Glisse <jglisse@...hat.com>
Cc: Minwoo Im <minwoo.im.dev@...il.com>
Cc: Jens Axboe <axboe@...nel.dk>
Signed-off-by: John Hubbard <jhubbard@...dia.com>
---
block/bio.c | 12 ++++++------
fs/block_dev.c | 4 ++--
fs/direct-io.c | 2 +-
include/linux/bio.h | 13 ++++++++++++-
4 files changed, 21 insertions(+), 10 deletions(-)
diff --git a/block/bio.c b/block/bio.c
index 299a0e7651ec..7675e2de509d 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -833,7 +833,7 @@ int bio_add_page(struct bio *bio, struct page *page,
}
EXPORT_SYMBOL(bio_add_page);
-void bio_release_pages(struct bio *bio, bool mark_dirty)
+void bio_release_pages(struct bio *bio, enum bio_rp_flags_t flags)
{
struct bvec_iter_all iter_all;
struct bio_vec *bvec;
@@ -842,7 +842,7 @@ void bio_release_pages(struct bio *bio, bool mark_dirty)
return;
bio_for_each_segment_all(bvec, bio, iter_all) {
- if (mark_dirty && !PageCompound(bvec->bv_page))
+ if ((flags & BIO_RP_MARK_DIRTY) && !PageCompound(bvec->bv_page))
set_page_dirty_lock(bvec->bv_page);
put_page(bvec->bv_page);
}
@@ -1421,7 +1421,7 @@ struct bio *bio_map_user_iov(struct request_queue *q,
return bio;
out_unmap:
- bio_release_pages(bio, false);
+ bio_release_pages(bio, BIO_RP_NORMAL);
bio_put(bio);
return ERR_PTR(ret);
}
@@ -1437,7 +1437,7 @@ struct bio *bio_map_user_iov(struct request_queue *q,
*/
void bio_unmap_user(struct bio *bio)
{
- bio_release_pages(bio, bio_data_dir(bio) == READ);
+ bio_release_pages(bio, bio_rp_dirty_flag(bio_data_dir(bio) == READ));
bio_put(bio);
bio_put(bio);
}
@@ -1683,7 +1683,7 @@ static void bio_dirty_fn(struct work_struct *work)
while ((bio = next) != NULL) {
next = bio->bi_private;
- bio_release_pages(bio, true);
+ bio_release_pages(bio, BIO_RP_MARK_DIRTY);
bio_put(bio);
}
}
@@ -1699,7 +1699,7 @@ void bio_check_pages_dirty(struct bio *bio)
goto defer;
}
- bio_release_pages(bio, false);
+ bio_release_pages(bio, BIO_RP_NORMAL);
bio_put(bio);
return;
defer:
diff --git a/fs/block_dev.c b/fs/block_dev.c
index 4707dfff991b..9fe6616f8788 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -259,7 +259,7 @@ __blkdev_direct_IO_simple(struct kiocb *iocb, struct iov_iter *iter,
}
__set_current_state(TASK_RUNNING);
- bio_release_pages(&bio, should_dirty);
+ bio_release_pages(&bio, bio_rp_dirty_flag(should_dirty));
if (unlikely(bio.bi_status))
ret = blk_status_to_errno(bio.bi_status);
@@ -329,7 +329,7 @@ static void blkdev_bio_end_io(struct bio *bio)
if (should_dirty) {
bio_check_pages_dirty(bio);
} else {
- bio_release_pages(bio, false);
+ bio_release_pages(bio, BIO_RP_NORMAL);
bio_put(bio);
}
}
diff --git a/fs/direct-io.c b/fs/direct-io.c
index ae196784f487..423ef431ddda 100644
--- a/fs/direct-io.c
+++ b/fs/direct-io.c
@@ -551,7 +551,7 @@ static blk_status_t dio_bio_complete(struct dio *dio, struct bio *bio)
if (dio->is_async && should_dirty) {
bio_check_pages_dirty(bio); /* transfers ownership */
} else {
- bio_release_pages(bio, should_dirty);
+ bio_release_pages(bio, bio_rp_dirty_flag(should_dirty));
bio_put(bio);
}
return err;
diff --git a/include/linux/bio.h b/include/linux/bio.h
index 3cdb84cdc488..2715e55679c1 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -440,7 +440,18 @@ bool __bio_try_merge_page(struct bio *bio, struct page *page,
void __bio_add_page(struct bio *bio, struct page *page,
unsigned int len, unsigned int off);
int bio_iov_iter_get_pages(struct bio *bio, struct iov_iter *iter);
-void bio_release_pages(struct bio *bio, bool mark_dirty);
+
+enum bio_rp_flags_t {
+ BIO_RP_NORMAL = 0,
+ BIO_RP_MARK_DIRTY = 1,
+};
+
+static inline enum bio_rp_flags_t bio_rp_dirty_flag(bool mark_dirty)
+{
+ return mark_dirty ? BIO_RP_MARK_DIRTY : BIO_RP_NORMAL;
+}
+
+void bio_release_pages(struct bio *bio, enum bio_rp_flags_t flags);
struct rq_map_data;
extern struct bio *bio_map_user_iov(struct request_queue *,
struct iov_iter *, gfp_t);
--
2.22.0
Powered by blists - more mailing lists