From: Chuck Lever <chuck.lever@xxxxxxxxxx>
Refactor: Enable the use of IOCB flags to control NFSD's individual
read operations (when not using splice). This allows the eventual
use of atomic, uncached, direct, or asynchronous reads.
Suggested-by: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Reviewed-by: NeilBrown <neil@xxxxxxxxxx>
Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
---
fs/nfsd/vfs.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index cd689df2ca5d..7b3bd141d54f 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -1086,10 +1086,14 @@ __be32 nfsd_iter_read(struct svc_rqst *rqstp, struct svc_fh *fhp,
{
unsigned long v, total;
struct iov_iter iter;
- loff_t ppos = offset;
+ struct kiocb kiocb;
ssize_t host_err;
size_t len;
+ init_sync_kiocb(&kiocb, file);
+ kiocb.ki_pos = offset;
+ kiocb.ki_flags = 0;
+
v = 0;
total = *count;
while (total) {
@@ -1104,7 +1108,7 @@ __be32 nfsd_iter_read(struct svc_rqst *rqstp, struct svc_fh *fhp,
trace_nfsd_read_vector(rqstp, fhp, offset, *count);
iov_iter_bvec(&iter, ITER_DEST, rqstp->rq_bvec, v, *count);
- host_err = vfs_iter_read(file, &iter, &ppos, 0);
+ host_err = vfs_iocb_iter_read(file, &kiocb, &iter);
return nfsd_finish_read(rqstp, fhp, file, offset, count, eof, host_err);
}
--
2.49.0
