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author | Yan, Zheng <zyan@redhat.com> | 2016-11-08 21:54:34 +0800 |
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committer | Ilya Dryomov <idryomov@gmail.com> | 2016-12-12 23:54:27 +0100 |
commit | 7ce469a53e7106acdaca2e25027941d0f7c12a8e (patch) | |
tree | 81864fb541f3ba5eb6080823d961addc87053955 /fs/ceph/mds_client.c | |
parent | 2b1ac852eb67a6e95595e576371d23519105559f (diff) | |
download | linux-7ce469a53e7106acdaca2e25027941d0f7c12a8e.tar.bz2 |
ceph: fix splice read for no Fc capability case
When iov_iter type is ITER_PIPE, copy_page_to_iter() increases
the page's reference and add the page to a pipe_buffer. It also
set the pipe_buffer's ops to page_cache_pipe_buf_ops. The comfirm
callback in page_cache_pipe_buf_ops expects the page is from page
cache and uptodate, otherwise it return error.
For ceph_sync_read() case, pages are not from page cache. So we
can't call copy_page_to_iter() when iov_iter type is ITER_PIPE.
The fix is using iov_iter_get_pages_alloc() to allocate pages
for the pipe. (the code is similar to default_file_splice_read)
Signed-off-by: Yan, Zheng <zyan@redhat.com>
Diffstat (limited to 'fs/ceph/mds_client.c')
0 files changed, 0 insertions, 0 deletions