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[PATCH] splice: add a SPLICE_F_MORE flag

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This lets userspace indicate whether more data will be coming in a
subsequent splice call.

Signed-off-by: Jens Axboe <axboe@suse.de>
This commit is contained in:
Jens Axboe 2006-04-02 23:05:41 +02:00
parent 83f9135bdd
commit b2b39fa478
2 changed files with 4 additions and 2 deletions
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5
fs/splice.c
View File

@ -354,6 +354,7 @@ static int pipe_to_sendpage(struct pipe_inode_info *info,
unsigned int offset;
ssize_t ret;
void *ptr;
int more;
/*
* sub-optimal, but we are limited by the pipe ->map. we don't
@ -366,9 +367,9 @@ static int pipe_to_sendpage(struct pipe_inode_info *info,
return PTR_ERR(ptr);
offset = pos & ~PAGE_CACHE_MASK;
more = (sd->flags & SPLICE_F_MORE) || sd->len < sd->total_len;
ret = file->f_op->sendpage(file, buf->page, offset, sd->len, &pos,
sd->len < sd->total_len);
ret = file->f_op->sendpage(file, buf->page, offset, sd->len, &pos,more);
buf->ops->unmap(info, buf);
if (ret == sd->len)

1
include/linux/pipe_fs_i.h
View File

@ -62,5 +62,6 @@ void free_pipe_info(struct inode* inode);
#define SPLICE_F_NONBLOCK (0x02) /* don't block on the pipe splicing (but */
/* we may still block on the fd we splice */
/* from/to, of course */
#define SPLICE_F_MORE (0x04) /* expect more data */
#endif