[PATCH v2 1/4] NFS: Cleanup usage of nfs_inode in fscache interface and handle i_size properly

[Dave Wysochanski <dwysocha@redhat.com>]

A number of places in the fscache interface used nfs_inode when inode could
be used, simplifying the code.  Also, handle the read of i_size properly by
utilizing the i_size_read() interface.

Signed-off-by: Dave Wysochanski <dwysocha@redhat.com>
---
 fs/nfs/fscache.c | 10 ++++------
 fs/nfs/fscache.h | 18 +++++++++---------
 2 files changed, 13 insertions(+), 15 deletions(-)

diff --git a/fs/nfs/fscache.c b/fs/nfs/fscache.c
index cfe901650ab0..81bd2770e640 100644
--- a/fs/nfs/fscache.c
+++ b/fs/nfs/fscache.c
@@ -173,7 +173,7 @@ void nfs_fscache_init_inode(struct inode *inode)
 	if (!(nfss->fscache && S_ISREG(inode->i_mode)))
 		return;
 
-	nfs_fscache_update_auxdata(&auxdata, nfsi);
+	nfs_fscache_update_auxdata(&auxdata, inode);
 
 	nfsi->fscache = fscache_acquire_cookie(NFS_SB(inode->i_sb)->fscache,
 					       0,
@@ -181,7 +181,7 @@ void nfs_fscache_init_inode(struct inode *inode)
 					       nfsi->fh.size,
 					       &auxdata,      /* aux_data */
 					       sizeof(auxdata),
-					       i_size_read(&nfsi->vfs_inode));
+					       i_size_read(inode));
 }
 
 /*
@@ -220,7 +220,6 @@ void nfs_fscache_clear_inode(struct inode *inode)
 void nfs_fscache_open_file(struct inode *inode, struct file *filp)
 {
 	struct nfs_fscache_inode_auxdata auxdata;
-	struct nfs_inode *nfsi = NFS_I(inode);
 	struct fscache_cookie *cookie = nfs_i_fscache(inode);
 	bool open_for_write = inode_is_open_for_write(inode);
 
@@ -230,7 +229,7 @@ void nfs_fscache_open_file(struct inode *inode, struct file *filp)
 	fscache_use_cookie(cookie, open_for_write);
 	if (open_for_write) {
 		dfprintk(FSCACHE, "NFS: nfsi 0x%p disabling cache\n", nfsi);
-		nfs_fscache_update_auxdata(&auxdata, nfsi);
+		nfs_fscache_update_auxdata(&auxdata, inode);
 		fscache_invalidate(cookie, &auxdata, i_size_read(inode),
 				   FSCACHE_INVAL_DIO_WRITE);
 	}
@@ -240,11 +239,10 @@ void nfs_fscache_open_file(struct inode *inode, struct file *filp)
 void nfs_fscache_release_file(struct inode *inode, struct file *filp)
 {
 	struct nfs_fscache_inode_auxdata auxdata;
-	struct nfs_inode *nfsi = NFS_I(inode);
 	struct fscache_cookie *cookie = nfs_i_fscache(inode);
 
 	if (fscache_cookie_valid(cookie)) {
-		nfs_fscache_update_auxdata(&auxdata, nfsi);
+		nfs_fscache_update_auxdata(&auxdata, inode);
 		fscache_unuse_cookie(cookie, &auxdata, NULL);
 	}
 }
diff --git a/fs/nfs/fscache.h b/fs/nfs/fscache.h
index e0220fc40366..5cf7238e4886 100644
--- a/fs/nfs/fscache.h
+++ b/fs/nfs/fscache.h
@@ -85,16 +85,16 @@ static inline void nfs_readpage_to_fscache(struct inode *inode,
 }
 
 static inline void nfs_fscache_update_auxdata(struct nfs_fscache_inode_auxdata *auxdata,
-					      struct nfs_inode *nfsi)
+					      struct inode *inode)
 {
 	memset(auxdata, 0, sizeof(*auxdata));
-	auxdata->mtime_sec  = nfsi->vfs_inode.i_mtime.tv_sec;
-	auxdata->mtime_nsec = nfsi->vfs_inode.i_mtime.tv_nsec;
-	auxdata->ctime_sec  = nfsi->vfs_inode.i_ctime.tv_sec;
-	auxdata->ctime_nsec = nfsi->vfs_inode.i_ctime.tv_nsec;
+	auxdata->mtime_sec  = inode->i_mtime.tv_sec;
+	auxdata->mtime_nsec = inode->i_mtime.tv_nsec;
+	auxdata->ctime_sec  = inode->i_ctime.tv_sec;
+	auxdata->ctime_nsec = inode->i_ctime.tv_nsec;
 
-	if (NFS_SERVER(&nfsi->vfs_inode)->nfs_client->rpc_ops->version == 4)
-		auxdata->change_attr = inode_peek_iversion_raw(&nfsi->vfs_inode);
+	if (NFS_SERVER(inode)->nfs_client->rpc_ops->version == 4)
+		auxdata->change_attr = inode_peek_iversion_raw(inode);
 }
 
 /*
@@ -106,9 +106,9 @@ static inline void nfs_fscache_invalidate(struct inode *inode, int flags)
 	struct nfs_inode *nfsi = NFS_I(inode);
 
 	if (nfsi->fscache) {
-		nfs_fscache_update_auxdata(&auxdata, nfsi);
+		nfs_fscache_update_auxdata(&auxdata, inode);
 		fscache_invalidate(nfsi->fscache, &auxdata,
-				   i_size_read(&nfsi->vfs_inode), flags);
+				   i_size_read(inode), flags);
 	}
 }
 
-- 
1.8.3.1