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| author | Eric Dumazet <eric.dumazet@gmail.com> | 2012-04-04 11:08:51 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2012-04-20 10:20:05 +0200 |
| commit | bd1a68b59c8e3bce45fb76632c64e1e063c3962d (patch) | |
| tree | 20ee27961256383e8eccb8236f901315623383f9 | |
| parent | a637120e49021d197e9578cba545bbaa459cbb51 (diff) | |
| download | op-kernel-dev-bd1a68b59c8e3bce45fb76632c64e1e063c3962d.zip op-kernel-dev-bd1a68b59c8e3bce45fb76632c64e1e063c3962d.tar.gz | |
vmsplice: relax alignement requirements for SPLICE_F_GIFT
It seems there is no fundamental reason to limit vmsplice()
SPLICE_F_GIFT to page aligned chunks.
All helpers are prepared to cope with offsets in page.
This limitation makes vmsplice() API very impractical in the zero-copy
land.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Tom Herbert <therbert@google.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: David Miller <davem@davemloft.net>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Hugh Dickins <hughd@google.com>
Cc: Changli Gao <xiaosuo@gmail.com>
Cc: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
| -rw-r--r-- | fs/splice.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/splice.c b/fs/splice.c index 5f883de..5417aa3 100644 --- a/fs/splice.c +++ b/fs/splice.c @@ -1385,7 +1385,7 @@ static long do_splice(struct file *in, loff_t __user *off_in, */ static int get_iovec_page_array(const struct iovec __user *iov, unsigned int nr_vecs, struct page **pages, - struct partial_page *partial, int aligned, + struct partial_page *partial, bool aligned, unsigned int pipe_buffers) { int buffers = 0, error = 0; @@ -1623,7 +1623,7 @@ static long vmsplice_to_pipe(struct file *file, const struct iovec __user *iov, return -ENOMEM; spd.nr_pages = get_iovec_page_array(iov, nr_segs, spd.pages, - spd.partial, flags & SPLICE_F_GIFT, + spd.partial, false, pipe->buffers); if (spd.nr_pages <= 0) ret = spd.nr_pages; |
