[PATCH v1 15/38] nfsd: hook up nfsd_write to the new nfsd_file cache

[Jeff Layton <jlayton@poochiereds.net>]

Note that all callers currently pass in NULL for "file" anyway, so
there was already some dead code in here. Just eliminate that parm
and have it use the file cache instead of dealing directly with a
filp.

Signed-off-by: Jeff Layton <jeff.layton@primarydata.com>
---
 fs/nfsd/nfs3proc.c |  2 +-
 fs/nfsd/nfsproc.c  |  2 +-
 fs/nfsd/vfs.c      | 34 ++++++++++------------------------
 fs/nfsd/vfs.h      |  2 +-
 4 files changed, 13 insertions(+), 27 deletions(-)

diff --git a/fs/nfsd/nfs3proc.c b/fs/nfsd/nfs3proc.c
index 7b755b7f785c..4e46ac511479 100644
--- a/fs/nfsd/nfs3proc.c
+++ b/fs/nfsd/nfs3proc.c
@@ -192,7 +192,7 @@ nfsd3_proc_write(struct svc_rqst *rqstp, struct nfsd3_writeargs *argp,
 
 	fh_copy(&resp->fh, &argp->fh);
 	resp->committed = argp->stable;
-	nfserr = nfsd_write(rqstp, &resp->fh, NULL,
+	nfserr = nfsd_write(rqstp, &resp->fh,
 				   argp->offset,
 				   rqstp->rq_vec, argp->vlen,
 				   &cnt,
diff --git a/fs/nfsd/nfsproc.c b/fs/nfsd/nfsproc.c
index 4cd78ef4c95c..9893095cbee1 100644
--- a/fs/nfsd/nfsproc.c
+++ b/fs/nfsd/nfsproc.c
@@ -213,7 +213,7 @@ nfsd_proc_write(struct svc_rqst *rqstp, struct nfsd_writeargs *argp,
 		SVCFH_fmt(&argp->fh),
 		argp->len, argp->offset);
 
-	nfserr = nfsd_write(rqstp, fh_copy(&resp->fh, &argp->fh), NULL,
+	nfserr = nfsd_write(rqstp, fh_copy(&resp->fh, &argp->fh),
 				   argp->offset,
 				   rqstp->rq_vec, argp->vlen,
 			           &cnt,
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index 67cce7554bb3..0f31af897d4c 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -42,6 +42,7 @@
 
 #include "nfsd.h"
 #include "vfs.h"
+#include "filecache.h"
 #include "trace.h"
 
 #define NFSDDBG_FACILITY		NFSDDBG_FILEOP
@@ -1032,36 +1033,21 @@ __be32 nfsd_read(struct svc_rqst *rqstp, struct svc_fh *fhp,
  * N.B. After this call fhp needs an fh_put
  */
 __be32
-nfsd_write(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file *file,
-		loff_t offset, struct kvec *vec, int vlen, unsigned long *cnt,
-		int *stablep)
+nfsd_write(struct svc_rqst *rqstp, struct svc_fh *fhp, loff_t offset,
+	   struct kvec *vec, int vlen, unsigned long *cnt, int *stablep)
 {
-	__be32			err = 0;
+	__be32			err;
+	struct nfsd_file	*nf;
 
 	trace_write_start(rqstp, fhp, offset, vlen);
-
-	if (file) {
-		err = nfsd_permission(rqstp, fhp->fh_export, fhp->fh_dentry,
-				NFSD_MAY_WRITE|NFSD_MAY_OWNER_OVERRIDE);
-		if (err)
-			goto out;
+	err = nfsd_file_acquire(rqstp, fhp, NFSD_MAY_WRITE, &nf);
+	if (err == nfs_ok) {
 		trace_write_opened(rqstp, fhp, offset, vlen);
-		err = nfsd_vfs_write(rqstp, fhp, file, offset, vec, vlen, cnt,
-				stablep);
+		err = nfsd_vfs_write(rqstp, fhp, nf->nf_file, offset, vec,
+					vlen, cnt, stablep);
 		trace_write_io_done(rqstp, fhp, offset, vlen);
-	} else {
-		err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_WRITE, &file);
-		if (err)
-			goto out;
-
-		trace_write_opened(rqstp, fhp, offset, vlen);
-		if (cnt)
-			err = nfsd_vfs_write(rqstp, fhp, file, offset, vec, vlen,
-					     cnt, stablep);
-		trace_write_io_done(rqstp, fhp, offset, vlen);
-		fput(file);
+		nfsd_file_put(nf);
 	}
-out:
 	trace_write_done(rqstp, fhp, offset, vlen);
 	return err;
 }
diff --git a/fs/nfsd/vfs.h b/fs/nfsd/vfs.h
index b3beb896b08d..80692e06302d 100644
--- a/fs/nfsd/vfs.h
+++ b/fs/nfsd/vfs.h
@@ -81,7 +81,7 @@ __be32		nfsd_readv(struct file *, loff_t, struct kvec *, int,
 				unsigned long *);
 __be32 		nfsd_read(struct svc_rqst *, struct svc_fh *,
 				loff_t, struct kvec *, int, unsigned long *);
-__be32 		nfsd_write(struct svc_rqst *, struct svc_fh *,struct file *,
+__be32 		nfsd_write(struct svc_rqst *, struct svc_fh *,
 				loff_t, struct kvec *,int, unsigned long *, int *);
 __be32		nfsd_vfs_write(struct svc_rqst *rqstp, struct svc_fh *fhp,
 				struct file *file, loff_t offset,
-- 
2.4.3