From: David Howells <dhowells@redhat.com>
To: Pavel Begunkov <asml.silence@gmail.com>,
Matthew Wilcox <willy@infradead.org>,
Jens Axboe <axboe@kernel.dk>,
Alexander Viro <viro@zeniv.linux.org.uk>
Cc: dhowells@redhat.com,
Linus Torvalds <torvalds@linux-foundation.org>,
linux-fsdevel@vger.kernel.org, linux-block@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH 28/29] iov_iter: Split iov_iter_for_each_range()
Date: Sat, 21 Nov 2020 14:17:00 +0000 [thread overview]
Message-ID: <160596822038.154728.6350968091336040046.stgit@warthog.procyon.org.uk> (raw)
In-Reply-To: <160596800145.154728.7192318545120181269.stgit@warthog.procyon.org.uk>
Split iov_iter_for_each_range() by type.
Signed-off-by: David Howells <dhowells@redhat.com>
---
lib/iov_iter.c | 41 +++++++++++++++++++++++++++++++----------
1 file changed, 31 insertions(+), 10 deletions(-)
diff --git a/lib/iov_iter.c b/lib/iov_iter.c
index ca0e94596eda..db798966823e 100644
--- a/lib/iov_iter.c
+++ b/lib/iov_iter.c
@@ -2282,7 +2282,7 @@ int import_single_range(int rw, void __user *buf, size_t len,
}
EXPORT_SYMBOL(import_single_range);
-static int xxx_for_each_range(struct iov_iter *i, size_t bytes,
+static int bvec_for_each_range(struct iov_iter *i, size_t bytes,
int (*f)(struct kvec *vec, void *context),
void *context)
{
@@ -2291,18 +2291,39 @@ static int xxx_for_each_range(struct iov_iter *i, size_t bytes,
if (!bytes)
return 0;
- iterate_all_kinds(i, bytes, v, -EINVAL, ({
+ iterate_over_bvec(i, bytes, v, ({
w.iov_base = kmap(v.bv_page) + v.bv_offset;
w.iov_len = v.bv_len;
err = f(&w, context);
kunmap(v.bv_page);
- err;}), ({
+ err;
+ }));
+ return err;
+}
+
+static int kvec_for_each_range(struct iov_iter *i, size_t bytes,
+ int (*f)(struct kvec *vec, void *context),
+ void *context)
+{
+ struct kvec w;
+ int err = -EINVAL;
+ if (!bytes)
+ return 0;
+
+ iterate_over_kvec(i, bytes, v, ({
w = v;
- err = f(&w, context);})
- )
+ err = f(&w, context);
+ }));
return err;
}
+static int no_for_each_range(struct iov_iter *i, size_t bytes,
+ int (*f)(struct kvec *vec, void *context),
+ void *context)
+{
+ return !bytes ? 0 : -EINVAL;
+}
+
static const struct iov_iter_ops iovec_iter_ops = {
.type = ITER_IOVEC,
.copy_from_user_atomic = iovec_copy_from_user_atomic,
@@ -2334,7 +2355,7 @@ static const struct iov_iter_ops iovec_iter_ops = {
.get_pages_alloc = iovec_get_pages_alloc,
.npages = iovec_npages,
.dup_iter = iovec_kvec_dup_iter,
- .for_each_range = xxx_for_each_range,
+ .for_each_range = no_for_each_range,
};
static const struct iov_iter_ops kvec_iter_ops = {
@@ -2368,7 +2389,7 @@ static const struct iov_iter_ops kvec_iter_ops = {
.get_pages_alloc = no_get_pages_alloc,
.npages = kvec_npages,
.dup_iter = iovec_kvec_dup_iter,
- .for_each_range = xxx_for_each_range,
+ .for_each_range = kvec_for_each_range,
};
static const struct iov_iter_ops bvec_iter_ops = {
@@ -2402,7 +2423,7 @@ static const struct iov_iter_ops bvec_iter_ops = {
.get_pages_alloc = bvec_get_pages_alloc,
.npages = bvec_npages,
.dup_iter = bvec_dup_iter,
- .for_each_range = xxx_for_each_range,
+ .for_each_range = bvec_for_each_range,
};
static const struct iov_iter_ops pipe_iter_ops = {
@@ -2436,7 +2457,7 @@ static const struct iov_iter_ops pipe_iter_ops = {
.get_pages_alloc = pipe_get_pages_alloc,
.npages = pipe_npages,
.dup_iter = no_dup_iter,
- .for_each_range = xxx_for_each_range,
+ .for_each_range = no_for_each_range,
};
static const struct iov_iter_ops discard_iter_ops = {
@@ -2470,5 +2491,5 @@ static const struct iov_iter_ops discard_iter_ops = {
.get_pages_alloc = no_get_pages_alloc,
.npages = discard_npages,
.dup_iter = discard_dup_iter,
- .for_each_range = xxx_for_each_range,
+ .for_each_range = no_for_each_range,
};
next prev parent reply other threads:[~2020-11-21 14:17 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-21 14:13 [PATCH 00/29] RFC: iov_iter: Switch to using an ops table David Howells
2020-11-21 14:13 ` [PATCH 01/29] iov_iter: Switch to using a table of operations David Howells
2020-11-21 14:31 ` Pavel Begunkov
2020-11-23 23:21 ` Pavel Begunkov
2020-11-21 18:21 ` Linus Torvalds
2020-12-11 1:30 ` Al Viro
2020-11-22 13:33 ` David Howells
2020-11-22 13:58 ` David Laight
2020-11-22 19:22 ` Linus Torvalds
2020-11-22 22:34 ` David Laight
2020-11-22 22:46 ` David Laight
2020-11-23 8:05 ` Christoph Hellwig
2020-11-23 10:31 ` David Howells
2020-11-23 23:42 ` Pavel Begunkov
2020-11-24 12:50 ` David Howells
2020-11-24 15:30 ` Jens Axboe
2020-11-27 17:14 ` David Howells
2020-11-23 11:14 ` David Howells
[not found] ` <20201203064536.GE27350@xsang-OptiPlex-9020>
2020-12-03 17:47 ` [iov_iter] 9bd0e337c6: will-it-scale.per_process_ops -4.8% regression Linus Torvalds
2020-12-03 17:50 ` Jens Axboe
2020-12-04 11:50 ` David Howells
2020-12-04 11:51 ` David Howells
2020-12-07 13:10 ` Oliver Sang
2020-12-07 13:20 ` David Howells
2020-11-21 14:13 ` [PATCH 02/29] iov_iter: Split copy_page_to_iter() David Howells
2020-11-21 14:13 ` [PATCH 03/29] iov_iter: Split iov_iter_fault_in_readable David Howells
2020-11-21 14:13 ` [PATCH 04/29] iov_iter: Split the iterate_and_advance() macro David Howells
2020-11-21 14:14 ` [PATCH 05/29] iov_iter: Split copy_to_iter() David Howells
2020-11-21 14:14 ` [PATCH 06/29] iov_iter: Split copy_mc_to_iter() David Howells
2020-11-21 14:14 ` [PATCH 07/29] iov_iter: Split copy_from_iter() David Howells
2020-11-21 14:14 ` [PATCH 08/29] iov_iter: Split the iterate_all_kinds() macro David Howells
2020-11-21 14:14 ` [PATCH 09/29] iov_iter: Split copy_from_iter_full() David Howells
2020-11-21 14:14 ` [PATCH 10/29] iov_iter: Split copy_from_iter_nocache() David Howells
2020-11-21 14:14 ` [PATCH 11/29] iov_iter: Split copy_from_iter_flushcache() David Howells
2020-11-21 14:14 ` [PATCH 12/29] iov_iter: Split copy_from_iter_full_nocache() David Howells
2020-11-21 14:15 ` [PATCH 13/29] iov_iter: Split copy_page_from_iter() David Howells
2020-11-21 14:15 ` [PATCH 14/29] iov_iter: Split iov_iter_zero() David Howells
2020-11-21 14:15 ` [PATCH 15/29] iov_iter: Split copy_from_user_atomic() David Howells
2020-11-21 14:15 ` [PATCH 16/29] iov_iter: Split iov_iter_advance() David Howells
2020-11-21 14:15 ` [PATCH 17/29] iov_iter: Split iov_iter_revert() David Howells
2020-11-21 14:15 ` [PATCH 18/29] iov_iter: Split iov_iter_single_seg_count() David Howells
2020-11-21 14:15 ` [PATCH 19/29] iov_iter: Split iov_iter_alignment() David Howells
2020-11-21 14:15 ` [PATCH 20/29] iov_iter: Split iov_iter_gap_alignment() David Howells
2020-11-21 14:16 ` [PATCH 21/29] iov_iter: Split iov_iter_get_pages() David Howells
2020-11-21 14:16 ` [PATCH 22/29] iov_iter: Split iov_iter_get_pages_alloc() David Howells
2020-11-21 14:16 ` [PATCH 23/29] iov_iter: Split csum_and_copy_from_iter() David Howells
2020-11-21 14:16 ` [PATCH 24/29] iov_iter: Split csum_and_copy_from_iter_full() David Howells
2020-11-21 14:16 ` [PATCH 25/29] iov_iter: Split csum_and_copy_to_iter() David Howells
2020-11-21 14:16 ` [PATCH 26/29] iov_iter: Split iov_iter_npages() David Howells
2020-11-21 14:16 ` [PATCH 27/29] iov_iter: Split dup_iter() David Howells
2020-11-21 14:17 ` David Howells [this message]
2020-11-21 14:17 ` [PATCH 29/29] iov_iter: Remove iterate_all_kinds() and iterate_and_advance() David Howells
2020-11-21 14:34 ` [PATCH 00/29] RFC: iov_iter: Switch to using an ops table Pavel Begunkov
2020-11-21 18:23 ` Linus Torvalds
2020-12-11 3:24 ` Matthew Wilcox
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