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sendfile: convert nfsd to splice_direct_to_actor()

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Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Jens Axboe 2007-06-12 21:22:14 +02:00
parent f0930fffa9
commit cf8208d0ea
4 changed files with 34 additions and 19 deletions
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47
fs/nfsd/vfs.c
View file

@ -23,7 +23,7 @@
#include <linux/file.h>
#include <linux/mount.h>
#include <linux/major.h>
#include <linux/ext2_fs.h>
#include <linux/pipe_fs_i.h>
#include <linux/proc_fs.h>
#include <linux/stat.h>
#include <linux/fcntl.h>
@ -801,26 +801,32 @@ nfsd_get_raparms(dev_t dev, ino_t ino)
}
/*
* Grab and keep cached pages assosiated with a file in the svc_rqst
* so that they can be passed to the netowork sendmsg/sendpage routines
* directrly. They will be released after the sending has completed.
* Grab and keep cached pages associated with a file in the svc_rqst
* so that they can be passed to the network sendmsg/sendpage routines
* directly. They will be released after the sending has completed.
*/
static int
nfsd_read_actor(read_descriptor_t *desc, struct page *page, unsigned long offset , unsigned long size)
nfsd_splice_actor(struct pipe_inode_info *pipe, struct pipe_buffer *buf,
struct splice_desc *sd)
{
unsigned long count = desc->count;
struct svc_rqst *rqstp = desc->arg.data;
struct svc_rqst *rqstp = sd->u.data;
struct page **pp = rqstp->rq_respages + rqstp->rq_resused;
struct page *page = buf->page;
size_t size;
int ret;
if (size > count)
size = count;
ret = buf->ops->pin(pipe, buf);
if (unlikely(ret))
return ret;
size = sd->len;
if (rqstp->rq_res.page_len == 0) {
get_page(page);
put_page(*pp);
*pp = page;
rqstp->rq_resused++;
rqstp->rq_res.page_base = offset;
rqstp->rq_res.page_base = buf->offset;
rqstp->rq_res.page_len = size;
} else if (page != pp[-1]) {
get_page(page);
@ -832,11 +838,15 @@ nfsd_read_actor(read_descriptor_t *desc, struct page *page, unsigned long offset
} else
rqstp->rq_res.page_len += size;
desc->count = count - size;
desc->written += size;
return size;
}
static int nfsd_direct_splice_actor(struct pipe_inode_info *pipe,
struct splice_desc *sd)
{
return __splice_from_pipe(pipe, sd, nfsd_splice_actor);
}
static __be32
nfsd_vfs_read(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file *file,
loff_t offset, struct kvec *vec, int vlen, unsigned long *count)
@ -861,10 +871,15 @@ nfsd_vfs_read(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file *file,
if (ra && ra->p_set)
file->f_ra = ra->p_ra;
if (file->f_op->sendfile && rqstp->rq_sendfile_ok) {
rqstp->rq_resused = 1;
host_err = file->f_op->sendfile(file, &offset, *count,
nfsd_read_actor, rqstp);
if (file->f_op->splice_read && rqstp->rq_splice_ok) {
struct splice_desc sd = {
.len = 0,
.total_len = *count,
.pos = offset,
.u.data = rqstp,
};
host_err = splice_direct_to_actor(file, &sd, nfsd_direct_splice_actor);
} else {
oldfs = get_fs();
set_fs(KERNEL_DS);

2
include/linux/sunrpc/svc.h
View file

@ -253,7 +253,7 @@ struct svc_rqst {
* determine what device number
* to report (real or virtual)
*/
int rq_sendfile_ok; /* turned off in gss privacy
int rq_splice_ok; /* turned off in gss privacy
* to prevent encrypting page
* cache pages */
wait_queue_head_t rq_wait; /* synchronization */

2
net/sunrpc/auth_gss/svcauth_gss.c
View file

@ -853,7 +853,7 @@ unwrap_priv_data(struct svc_rqst *rqstp, struct xdr_buf *buf, u32 seq, struct gs
u32 priv_len, maj_stat;
int pad, saved_len, remaining_len, offset;
rqstp->rq_sendfile_ok = 0;
rqstp->rq_splice_ok = 0;
priv_len = svc_getnl(&buf->head[0]);
if (rqstp->rq_deferred) {

2
net/sunrpc/svc.c
View file

@ -814,7 +814,7 @@ svc_process(struct svc_rqst *rqstp)
rqstp->rq_res.tail[0].iov_base = NULL;
rqstp->rq_res.tail[0].iov_len = 0;
/* Will be turned off only in gss privacy case: */
rqstp->rq_sendfile_ok = 1;
rqstp->rq_splice_ok = 1;
/* tcp needs a space for the record length... */
if (rqstp->rq_prot == IPPROTO_TCP)
svc_putnl(resv, 0);