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Fri, 05 Jun 2026 23:12:36 -0700 (PDT) From: Askar Safin To: linux-fsdevel@vger.kernel.org, Christian Brauner , Alexander Viro , Jan Kara Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-api@vger.kernel.org, netdev@vger.kernel.org, fuse-devel@lists.linux.dev, ltp@lists.linux.it, Linus Torvalds , Matthew Wilcox , Jens Axboe , Christoph Hellwig , David Howells , Andrew Morton , David Hildenbrand , Pedro Falcato , Miklos Szeredi , Andy Lutomirski , Collin Funk , David Laight , Stefan Metzmacher , Steven Rostedt , The 8472 , Willy Tarreau , Joanne Koong , patches@lists.linux.dev Subject: [PATCH 4/5] pipe: move wait_for_space to fs/pipe.c and rename it Date: Sat, 6 Jun 2026 06:10:30 +0000 Message-ID: <20260606061031.3744880-5-safinaskar@gmail.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260606061031.3744880-1-safinaskar@gmail.com> References: <20260606061031.3744880-1-safinaskar@gmail.com> Precedence: bulk X-Mailing-List: linux-api@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit This is needed, because I plan to use it in fs/read_write.c. Signed-off-by: Askar Safin --- fs/pipe.c | 17 +++++++++++++++++ fs/splice.c | 19 +------------------ include/linux/pipe_fs_i.h | 2 ++ 3 files changed, 20 insertions(+), 18 deletions(-) diff --git a/fs/pipe.c b/fs/pipe.c index 9841648c9..c0ccf21b9 100644 --- a/fs/pipe.c +++ b/fs/pipe.c @@ -1451,6 +1451,23 @@ long pipe_fcntl(struct file *file, unsigned int cmd, unsigned int arg) return ret; } +int pipe_wait_for_space(struct pipe_inode_info *pipe, bool non_block) +{ + for (;;) { + if (unlikely(!pipe->readers)) { + send_sig(SIGPIPE, current, 0); + return -EPIPE; + } + if (!pipe_is_full(pipe)) + return 0; + if (non_block) + return -EAGAIN; + if (signal_pending(current)) + return -ERESTARTSYS; + pipe_wait_writable(pipe); + } +} + static const struct super_operations pipefs_ops = { .destroy_inode = free_inode_nonrcu, .statfs = simple_statfs, diff --git a/fs/splice.c b/fs/splice.c index 707db2c2c..d12243d19 100644 --- a/fs/splice.c +++ b/fs/splice.c @@ -1239,23 +1239,6 @@ ssize_t splice_file_range(struct file *in, loff_t *ppos, struct file *out, } EXPORT_SYMBOL(splice_file_range); -static int wait_for_space(struct pipe_inode_info *pipe, bool non_block) -{ - for (;;) { - if (unlikely(!pipe->readers)) { - send_sig(SIGPIPE, current, 0); - return -EPIPE; - } - if (!pipe_is_full(pipe)) - return 0; - if (non_block) - return -EAGAIN; - if (signal_pending(current)) - return -ERESTARTSYS; - pipe_wait_writable(pipe); - } -} - static int splice_pipe_to_pipe(struct pipe_inode_info *ipipe, struct pipe_inode_info *opipe, size_t len, unsigned int flags); @@ -1268,7 +1251,7 @@ ssize_t splice_file_to_pipe(struct file *in, ssize_t ret; pipe_lock(opipe); - ret = wait_for_space(opipe, flags & SPLICE_F_NONBLOCK); + ret = pipe_wait_for_space(opipe, flags & SPLICE_F_NONBLOCK); if (!ret) ret = do_splice_read(in, offset, opipe, len, flags); pipe_unlock(opipe); diff --git a/include/linux/pipe_fs_i.h b/include/linux/pipe_fs_i.h index a1eeed800..be653625d 100644 --- a/include/linux/pipe_fs_i.h +++ b/include/linux/pipe_fs_i.h @@ -335,4 +335,6 @@ struct pipe_inode_info *get_pipe_info(struct file *file, bool for_splice); int create_pipe_files(struct file **, int); unsigned int round_pipe_size(unsigned int size); +int pipe_wait_for_space(struct pipe_inode_info *pipe, bool non_block); + #endif -- 2.47.3