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NFSD: Use vfs_iocb_iter_read()

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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@infradead.org>
Reviewed-by: NeilBrown <neil@brown.name>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
Chuck Lever
2025-06-13 16:08:46 -04:00
parent 61df439a32
commit 37fe6f1be5
1 changed files with 5 additions and 2 deletions
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7
fs/nfsd/vfs.c
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@@ -1086,10 +1086,13 @@ __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;
v = 0;
total = *count;
while (total) {
@@ -1104,7 +1107,7 @@ __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);
}