| Message ID | 023c0e21e595e00b93903a813bc0bfb9a5d7e368.1690219914.git.jstancek@redhat.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v2] splice, net: Fix splice_to_socket() for O_NONBLOCK socket | expand |
On Mon, 2023-07-24 at 19:39 +0200, Jan Stancek wrote: > LTP sendfile07 [1], which expects sendfile() to return EAGAIN when > transferring data from regular file to a "full" O_NONBLOCK socket, > started failing after commit 2dc334f1a63a ("splice, net: Use > sendmsg(MSG_SPLICE_PAGES) rather than ->sendpage()"). > sendfile() no longer immediately returns, but now blocks. > > Removed sock_sendpage() handled this case by setting a MSG_DONTWAIT > flag, fix new splice_to_socket() to do the same for O_NONBLOCK sockets. > > [1] https://github.com/linux-test-project/ltp/blob/master/testcases/kernel/syscalls/sendfile/sendfile07.c > > Fixes: 2dc334f1a63a ("splice, net: Use sendmsg(MSG_SPLICE_PAGES) rather than ->sendpage()") > Acked-by: David Howells <dhowells@redhat.com> > Signed-off-by: Jan Stancek <jstancek@redhat.com> This issue caused the "test_asyncio" test in Python 3 test suite to hang indefinitely. I can confirm this patch fixes the issue. Tested-by: Xi Ruoyao <xry111@xry111.site> > --- > Changes in v2: > - add David's Acked-by > - add netdev list > > fs/splice.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/fs/splice.c b/fs/splice.c > index 004eb1c4ce31..3e2a31e1ce6a 100644 > --- a/fs/splice.c > +++ b/fs/splice.c > @@ -876,6 +876,8 @@ ssize_t splice_to_socket(struct pipe_inode_info *pipe, struct file *out, > msg.msg_flags |= MSG_MORE; > if (remain && pipe_occupancy(pipe->head, tail) > 0) > msg.msg_flags |= MSG_MORE; > + if (out->f_flags & O_NONBLOCK) > + msg.msg_flags |= MSG_DONTWAIT; > > iov_iter_bvec(&msg.msg_iter, ITER_SOURCE, bvec, bc, > len - remain);
Hello: This patch was applied to netdev/net.git (main) by Jakub Kicinski <kuba@kernel.org>: On Mon, 24 Jul 2023 19:39:04 +0200 you wrote: > LTP sendfile07 [1], which expects sendfile() to return EAGAIN when > transferring data from regular file to a "full" O_NONBLOCK socket, > started failing after commit 2dc334f1a63a ("splice, net: Use > sendmsg(MSG_SPLICE_PAGES) rather than ->sendpage()"). > sendfile() no longer immediately returns, but now blocks. > > Removed sock_sendpage() handled this case by setting a MSG_DONTWAIT > flag, fix new splice_to_socket() to do the same for O_NONBLOCK sockets. > > [...] Here is the summary with links: - [v2] splice, net: Fix splice_to_socket() for O_NONBLOCK socket https://git.kernel.org/netdev/net/c/0f0fa27b871b You are awesome, thank you!
diff --git a/fs/splice.c b/fs/splice.c index 004eb1c4ce31..3e2a31e1ce6a 100644 --- a/fs/splice.c +++ b/fs/splice.c @@ -876,6 +876,8 @@ ssize_t splice_to_socket(struct pipe_inode_info *pipe, struct file *out, msg.msg_flags |= MSG_MORE; if (remain && pipe_occupancy(pipe->head, tail) > 0) msg.msg_flags |= MSG_MORE; + if (out->f_flags & O_NONBLOCK) + msg.msg_flags |= MSG_DONTWAIT; iov_iter_bvec(&msg.msg_iter, ITER_SOURCE, bvec, bc, len - remain);
LTP sendfile07 [1], which expects sendfile() to return EAGAIN when transferring data from regular file to a "full" O_NONBLOCK socket, started failing after commit 2dc334f1a63a ("splice, net: Use sendmsg(MSG_SPLICE_PAGES) rather than ->sendpage()"). sendfile() no longer immediately returns, but now blocks. Removed sock_sendpage() handled this case by setting a MSG_DONTWAIT flag, fix new splice_to_socket() to do the same for O_NONBLOCK sockets. [1] https://github.com/linux-test-project/ltp/blob/master/testcases/kernel/syscalls/sendfile/sendfile07.c Fixes: 2dc334f1a63a ("splice, net: Use sendmsg(MSG_SPLICE_PAGES) rather than ->sendpage()") Acked-by: David Howells <dhowells@redhat.com> Signed-off-by: Jan Stancek <jstancek@redhat.com> --- Changes in v2: - add David's Acked-by - add netdev list fs/splice.c | 2 ++ 1 file changed, 2 insertions(+)