Use copy_splice_read() for tty, procfs, kernfs and random files rather
than going through generic_file_splice_read() as they just copy the file
into the output buffer and don't splice pages. This avoids the need for
them to have a ->read_folio() to satisfy filemap_splice_read().
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
cc: Christoph Hellwig <hch@lst.de>
cc: Jens Axboe <axboe@kernel.dk>
cc: Al Viro <viro@zeniv.linux.org.uk>
cc: John Hubbard <jhubbard@nvidia.com>
cc: David Hildenbrand <david@redhat.com>
cc: Matthew Wilcox <willy@infradead.org>
cc: Miklos Szeredi <miklos@szeredi.hu>
cc: Arnd Bergmann <arnd@arndb.de>
cc: linux-block@vger.kernel.org
cc: linux-fsdevel@vger.kernel.org
cc: linux-mm@kvack.org
Link: https://lore.kernel.org/r/20230522135018.2742245-13-dhowells@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
.compat_ioctl = compat_ptr_ioctl,
.fasync = random_fasync,
.llseek = noop_llseek,
- .splice_read = generic_file_splice_read,
+ .splice_read = copy_splice_read,
.splice_write = iter_file_splice_write,
};
.compat_ioctl = compat_ptr_ioctl,
.fasync = random_fasync,
.llseek = noop_llseek,
- .splice_read = generic_file_splice_read,
+ .splice_read = copy_splice_read,
.splice_write = iter_file_splice_write,
};
.llseek = no_llseek,
.read_iter = tty_read,
.write_iter = tty_write,
- .splice_read = generic_file_splice_read,
+ .splice_read = copy_splice_read,
.splice_write = iter_file_splice_write,
.poll = tty_poll,
.unlocked_ioctl = tty_ioctl,
.llseek = no_llseek,
.read_iter = tty_read,
.write_iter = redirected_tty_write,
- .splice_read = generic_file_splice_read,
+ .splice_read = copy_splice_read,
.splice_write = iter_file_splice_write,
.poll = tty_poll,
.unlocked_ioctl = tty_ioctl,
.release = kernfs_fop_release,
.poll = kernfs_fop_poll,
.fsync = noop_fsync,
- .splice_read = generic_file_splice_read,
+ .splice_read = copy_splice_read,
.splice_write = iter_file_splice_write,
};
.llseek = proc_reg_llseek,
.read_iter = proc_reg_read_iter,
.write = proc_reg_write,
- .splice_read = generic_file_splice_read,
+ .splice_read = copy_splice_read,
.poll = proc_reg_poll,
.unlocked_ioctl = proc_reg_unlocked_ioctl,
.mmap = proc_reg_mmap,
static const struct file_operations proc_iter_file_ops_compat = {
.llseek = proc_reg_llseek,
.read_iter = proc_reg_read_iter,
- .splice_read = generic_file_splice_read,
+ .splice_read = copy_splice_read,
.write = proc_reg_write,
.poll = proc_reg_poll,
.unlocked_ioctl = proc_reg_unlocked_ioctl,
.poll = proc_sys_poll,
.read_iter = proc_sys_read,
.write_iter = proc_sys_write,
- .splice_read = generic_file_splice_read,
+ .splice_read = copy_splice_read,
.splice_write = iter_file_splice_write,
.llseek = default_llseek,
};
const struct file_operations proc_mounts_operations = {
.open = mounts_open,
.read_iter = seq_read_iter,
- .splice_read = generic_file_splice_read,
+ .splice_read = copy_splice_read,
.llseek = seq_lseek,
.release = mounts_release,
.poll = mounts_poll,
const struct file_operations proc_mountinfo_operations = {
.open = mountinfo_open,
.read_iter = seq_read_iter,
- .splice_read = generic_file_splice_read,
+ .splice_read = copy_splice_read,
.llseek = seq_lseek,
.release = mounts_release,
.poll = mounts_poll,
const struct file_operations proc_mountstats_operations = {
.open = mountstats_open,
.read_iter = seq_read_iter,
- .splice_read = generic_file_splice_read,
+ .splice_read = copy_splice_read,
.llseek = seq_lseek,
.release = mounts_release,
};