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authorChuck Lever <chuck.lever@oracle.com>2023-11-18 01:14:40 +0300
committerChuck Lever <chuck.lever@oracle.com>2024-01-08 01:54:25 +0300
commita2c91753a4f3771a9b46eb42e0c46654819149a4 (patch)
tree8f8729bcc3c7bc4a7add72b9a6b15ac604235e76 /fs/nfsd
parentc21fd7a8e86c0e069b512462ffd69bcf179387c8 (diff)
downloadlinux-a2c91753a4f3771a9b46eb42e0c46654819149a4.tar.xz
NFSD: Modify NFSv4 to use nfsd_read_splice_ok()
Avoid the use of an atomic bitop, and prepare for adding a run-time switch for using splice reads. Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Diffstat (limited to 'fs/nfsd')
-rw-r--r--fs/nfsd/nfs4proc.c7
-rw-r--r--fs/nfsd/nfs4xdr.c13
-rw-r--r--fs/nfsd/xdr4.h1
3 files changed, 14 insertions, 7 deletions
diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c
index 6f2d4aa4970d..14712fa08f76 100644
--- a/fs/nfsd/nfs4proc.c
+++ b/fs/nfsd/nfs4proc.c
@@ -970,8 +970,11 @@ nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
* To ensure proper ordering, we therefore turn off zero copy if
* the client wants us to do more in this compound:
*/
- if (!nfsd4_last_compound_op(rqstp))
- clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags);
+ if (!nfsd4_last_compound_op(rqstp)) {
+ struct nfsd4_compoundargs *argp = rqstp->rq_argp;
+
+ argp->splice_ok = false;
+ }
/* check stateid */
status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index b499fe9caa32..c719c475a068 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -2524,8 +2524,9 @@ nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
svc_reserve(argp->rqstp, max_reply + readbytes);
argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
+ argp->splice_ok = nfsd_read_splice_ok(argp->rqstp);
if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
- clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags);
+ argp->splice_ok = false;
return true;
}
@@ -4375,12 +4376,13 @@ static __be32
nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
union nfsd4_op_u *u)
{
+ struct nfsd4_compoundargs *argp = resp->rqstp->rq_argp;
struct nfsd4_read *read = &u->read;
- bool splice_ok = test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags);
- unsigned long maxcount;
struct xdr_stream *xdr = resp->xdr;
- struct file *file;
int starting_len = xdr->buf->len;
+ bool splice_ok = argp->splice_ok;
+ unsigned long maxcount;
+ struct file *file;
__be32 *p;
if (nfserr)
@@ -5201,9 +5203,10 @@ static __be32
nfsd4_encode_read_plus_data(struct nfsd4_compoundres *resp,
struct nfsd4_read *read)
{
- bool splice_ok = test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags);
+ struct nfsd4_compoundargs *argp = resp->rqstp->rq_argp;
struct file *file = read->rd_nf->nf_file;
struct xdr_stream *xdr = resp->xdr;
+ bool splice_ok = argp->splice_ok;
unsigned long maxcount;
__be32 nfserr, *p;
diff --git a/fs/nfsd/xdr4.h b/fs/nfsd/xdr4.h
index 80e859dc84d8..415516c1b27e 100644
--- a/fs/nfsd/xdr4.h
+++ b/fs/nfsd/xdr4.h
@@ -840,6 +840,7 @@ struct nfsd4_compoundargs {
u32 minorversion;
u32 client_opcnt;
u32 opcnt;
+ bool splice_ok;
struct nfsd4_op *ops;
struct nfsd4_op iops[8];
};