sendfile: convert nfsd to splice_direct_to_actor()

[safe/jmp/linux-2.6] / fs / nfsd / vfs.c

diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index 7e6aa24..15471a9 100644 (file)
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -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 @@ found:
 }
 
 /*
- * 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;
+
+       ret = buf->ops->pin(pipe, buf);
+       if (unlikely(ret))
+               return ret;
 
-       if (size > count)
-               size = count;
+       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);