[PATCH v2 03/30] fuse: Use default_file_splice_read for direct IO

Vivek Goyal
2019-05-15T19:31:46Z

From: Miklos Szeredi <mszeredi@redhat.com>

---
fs/fuse/file.c | 15 ++++++++++++++-
fs/splice.c | 3 ++-
include/linux/fs.h | 2 ++
3 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 5baf07fd2876..e9a7aa97c539 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -2167,6 +2167,19 @@ static int fuse_file_mmap(struct file *file, struct vm_area_struct *vma)
return 0;
}

+static ssize_t fuse_file_splice_read(struct file *in, loff_t *ppos,
+ struct pipe_inode_info *pipe, size_t len,
+ unsigned int flags)
+{
+ struct fuse_file *ff = in->private_data;
+
+ if (ff->open_flags & FOPEN_DIRECT_IO)
+ return default_file_splice_read(in, ppos, pipe, len, flags);
+ else
+ return generic_file_splice_read(in, ppos, pipe, len, flags);
+
+}
+
static int convert_fuse_file_lock(struct fuse_conn *fc,
const struct fuse_file_lock *ffl,
struct file_lock *fl)
@@ -3174,7 +3187,7 @@ static const struct file_operations fuse_file_operations = {
.fsync = fuse_fsync,
.lock = fuse_file_lock,
.flock = fuse_file_flock,
- .splice_read = generic_file_splice_read,
+ .splice_read = fuse_file_splice_read,
.splice_write = iter_file_splice_write,
.unlocked_ioctl = fuse_file_ioctl,
.compat_ioctl = fuse_file_compat_ioctl,
diff --git a/fs/splice.c b/fs/splice.c
index 25212dcca2df..e2e881e34935 100644
--- a/fs/splice.c
+++ b/fs/splice.c
@@ -361,7 +361,7 @@ static ssize_t kernel_readv(struct file *file, const struct kvec *vec,
return res;
}

-static ssize_t default_file_splice_read(struct file *in, loff_t *ppos,
+ssize_t default_file_splice_read(struct file *in, loff_t *ppos,
struct pipe_inode_info *pipe, size_t len,
unsigned int flags)
{
@@ -425,6 +425,7 @@ static ssize_t default_file_splice_read(struct file *in, loff_t *ppos,
iov_iter_advance(&to, copied); /* truncates and discards */
return res;
}
+EXPORT_SYMBOL(default_file_splice_read);

/*
* Send 'sd->len' bytes to socket from 'sd->file' at position 'sd->pos'
diff --git a/include/linux/fs.h b/include/linux/fs.h
index dd28e7679089..6804aecf7e30 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -3055,6 +3055,8 @@ extern void block_sync_page(struct page *page);
/* fs/splice.c */
extern ssize_t generic_file_splice_read(struct file *, loff_t *,
struct pipe_inode_info *, size_t, unsigned int);
+extern ssize_t default_file_splice_read(struct file *, loff_t *,
+ struct pipe_inode_info *, size_t, unsigned int);
extern ssize_t iter_file_splice_write(struct pipe_inode_info *,
struct file *, loff_t *, size_t, unsigned int);
extern ssize_t generic_splice_sendpage(struct pipe_inode_info *pipe,
--
2.20.1