diff options
| author | Miklos Szeredi <miklos@szeredi.hu> | 2009-05-07 15:37:36 +0200 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2009-05-11 14:13:10 +0200 |
| commit | 6818173bd658439b83896a2a7586f64ab51bf29c (patch) | |
| tree | 17d25ee77485af18da1a80cb7f1d8ec581c6abfc /fs/read_write.c | |
| parent | 7c77f0b3f9208c339a4b40737bb2cb0f0319bb8d (diff) | |
| download | lwn-6818173bd658439b83896a2a7586f64ab51bf29c.tar.gz lwn-6818173bd658439b83896a2a7586f64ab51bf29c.zip | |
splice: implement default splice_read method
If f_op->splice_read() is not implemented, fall back to a plain read.
Use vfs_readv() to read into previously allocated pages.
This will allow splice and functions using splice, such as the loop
device, to work on all filesystems. This includes "direct_io" files
in fuse which bypass the page cache.
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'fs/read_write.c')
| -rw-r--r-- | fs/read_write.c | 7 |
1 files changed, 1 insertions, 6 deletions
diff --git a/fs/read_write.c b/fs/read_write.c index 9d1e76bb9ee1..6c8c55dec2bc 100644 --- a/fs/read_write.c +++ b/fs/read_write.c @@ -805,12 +805,6 @@ static ssize_t do_sendfile(int out_fd, int in_fd, loff_t *ppos, goto out; if (!(in_file->f_mode & FMODE_READ)) goto fput_in; - retval = -EINVAL; - in_inode = in_file->f_path.dentry->d_inode; - if (!in_inode) - goto fput_in; - if (!in_file->f_op || !in_file->f_op->splice_read) - goto fput_in; retval = -ESPIPE; if (!ppos) ppos = &in_file->f_pos; @@ -834,6 +828,7 @@ static ssize_t do_sendfile(int out_fd, int in_fd, loff_t *ppos, retval = -EINVAL; if (!out_file->f_op || !out_file->f_op->sendpage) goto fput_out; + in_inode = in_file->f_path.dentry->d_inode; out_inode = out_file->f_path.dentry->d_inode; retval = rw_verify_area(WRITE, out_file, &out_file->f_pos, count); if (retval < 0) |