cifs: Use filemap_splice_read()

Make cifs use filemap_splice_read() rather than doing its own version of
generic_file_splice_read().

Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Paulo Alcantara (SUSE) <pc@manguebit.com>
cc: Jens Axboe <axboe@kernel.dk>
cc: Steve French <smfrench@gmail.com>
cc: Al Viro <viro@zeniv.linux.org.uk>
cc: David Hildenbrand <david@redhat.com>
cc: John Hubbard <jhubbard@nvidia.com>
cc: linux-mm@kvack.org
cc: linux-block@vger.kernel.org
cc: linux-cifs@vger.kernel.org
cc: linux-fsdevel@vger.kernel.org
Link: https://lore.kernel.org/r/20230522135018.2742245-28-dhowells@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index fa2477b..4f4492e 100644 (file)
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -1376,7 +1376,7 @@ const struct file_operations cifs_file_ops = {
        .fsync = cifs_fsync,
        .flush = cifs_flush,
        .mmap  = cifs_file_mmap,
-       .splice_read = cifs_splice_read,
+       .splice_read = filemap_splice_read,
        .splice_write = iter_file_splice_write,
        .llseek = cifs_llseek,
        .unlocked_ioctl = cifs_ioctl,
@@ -1396,7 +1396,7 @@ const struct file_operations cifs_file_strict_ops = {
        .fsync = cifs_strict_fsync,
        .flush = cifs_flush,
        .mmap = cifs_file_strict_mmap,
-       .splice_read = cifs_splice_read,
+       .splice_read = filemap_splice_read,
        .splice_write = iter_file_splice_write,
        .llseek = cifs_llseek,
        .unlocked_ioctl = cifs_ioctl,
@@ -1434,7 +1434,7 @@ const struct file_operations cifs_file_nobrl_ops = {
        .fsync = cifs_fsync,
        .flush = cifs_flush,
        .mmap  = cifs_file_mmap,
-       .splice_read = cifs_splice_read,
+       .splice_read = filemap_splice_read,
        .splice_write = iter_file_splice_write,
        .llseek = cifs_llseek,
        .unlocked_ioctl = cifs_ioctl,
@@ -1452,7 +1452,7 @@ const struct file_operations cifs_file_strict_nobrl_ops = {
        .fsync = cifs_strict_fsync,
        .flush = cifs_flush,
        .mmap = cifs_file_strict_mmap,
-       .splice_read = cifs_splice_read,
+       .splice_read = filemap_splice_read,
        .splice_write = iter_file_splice_write,
        .llseek = cifs_llseek,
        .unlocked_ioctl = cifs_ioctl,

diff --git a/fs/cifs/cifsfs.h b/fs/cifs/cifsfs.h
index 74cd6fa..d7274ee 100644 (file)
--- a/fs/cifs/cifsfs.h
+++ b/fs/cifs/cifsfs.h
@@ -100,9 +100,6 @@ extern ssize_t cifs_strict_readv(struct kiocb *iocb, struct iov_iter *to);
 extern ssize_t cifs_user_writev(struct kiocb *iocb, struct iov_iter *from);
 extern ssize_t cifs_direct_writev(struct kiocb *iocb, struct iov_iter *from);
 extern ssize_t cifs_strict_writev(struct kiocb *iocb, struct iov_iter *from);
-extern ssize_t cifs_splice_read(struct file *in, loff_t *ppos,
-                               struct pipe_inode_info *pipe, size_t len,
-                               unsigned int flags);
 extern int cifs_flock(struct file *pfile, int cmd, struct file_lock *plock);
 extern int cifs_lock(struct file *, int, struct file_lock *);
 extern int cifs_fsync(struct file *, loff_t, loff_t, int);

diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index 0234962..375a803 100644 (file)
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -5078,19 +5078,3 @@ const struct address_space_operations cifs_addr_ops_smallbuf = {
        .launder_folio = cifs_launder_folio,
        .migrate_folio = filemap_migrate_folio,
 };
-
-/*
- * Splice data from a file into a pipe.
- */
-ssize_t cifs_splice_read(struct file *in, loff_t *ppos,
-                        struct pipe_inode_info *pipe, size_t len,
-                        unsigned int flags)
-{
-       if (unlikely(*ppos >= file_inode(in)->i_sb->s_maxbytes))
-               return 0;
-       if (unlikely(!len))
-               return 0;
-       if (in->f_flags & O_DIRECT)
-               return copy_splice_read(in, ppos, pipe, len, flags);
-       return filemap_splice_read(in, ppos, pipe, len, flags);
-}