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author | Miklos Szeredi <miklos@szeredi.hu> | 2009-05-07 15:37:36 +0200 |
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committer | Jens Axboe <jens.axboe@oracle.com> | 2009-05-11 14:13:10 +0200 |
commit | 6818173bd658439b83896a2a7586f64ab51bf29c (patch) | |
tree | 17d25ee77485af18da1a80cb7f1d8ec581c6abfc /fs/pipe.c | |
parent | 7c77f0b3f9208c339a4b40737bb2cb0f0319bb8d (diff) | |
download | kernel_goldelico_gta04-6818173bd658439b83896a2a7586f64ab51bf29c.zip kernel_goldelico_gta04-6818173bd658439b83896a2a7586f64ab51bf29c.tar.gz kernel_goldelico_gta04-6818173bd658439b83896a2a7586f64ab51bf29c.tar.bz2 |
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/pipe.c')
-rw-r--r-- | fs/pipe.c | 14 |
1 files changed, 14 insertions, 0 deletions
@@ -302,6 +302,20 @@ int generic_pipe_buf_confirm(struct pipe_inode_info *info, return 0; } +/** + * generic_pipe_buf_release - put a reference to a &struct pipe_buffer + * @pipe: the pipe that the buffer belongs to + * @buf: the buffer to put a reference to + * + * Description: + * This function releases a reference to @buf. + */ +void generic_pipe_buf_release(struct pipe_inode_info *pipe, + struct pipe_buffer *buf) +{ + page_cache_release(buf->page); +} + static const struct pipe_buf_operations anon_pipe_buf_ops = { .can_merge = 1, .map = generic_pipe_buf_map, |