[PATCH 1/5] 9p: add iocb parameter to p9_client_read and p9_client_write

[Stefano Stabellini]

The parameter can be NULL.
Currently not utilized, but it will be used in later patches.

Signed-off-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>
---
 fs/9p/vfs_addr.c        | 8 ++++----
 fs/9p/vfs_dir.c         | 2 +-
 fs/9p/vfs_file.c        | 4 ++--
 fs/9p/xattr.c           | 4 ++--
 include/net/9p/client.h | 7 +++++--
 net/9p/client.c         | 6 ++++--
 6 files changed, 18 insertions(+), 13 deletions(-)

diff --git a/fs/9p/vfs_addr.c b/fs/9p/vfs_addr.c
index 6181ad7..99ba284 100644
--- a/fs/9p/vfs_addr.c
+++ b/fs/9p/vfs_addr.c
@@ -66,7 +66,7 @@ static int v9fs_fid_readpage(struct p9_fid *fid, struct page *page)
 
 	iov_iter_bvec(&to, ITER_BVEC | READ, &bvec, 1, PAGE_SIZE);
 
-	retval = p9_client_read(fid, page_offset(page), &to, &err);
+	retval = p9_client_read(fid, NULL, page_offset(page), &to, &err);
 	if (err) {
 		v9fs_uncache_page(inode, page);
 		retval = err;
@@ -181,7 +181,7 @@ static int v9fs_vfs_writepage_locked(struct page *page)
 
 	set_page_writeback(page);
 
-	p9_client_write(v9inode->writeback_fid, page_offset(page), &from, &err);
+	p9_client_write(v9inode->writeback_fid, NULL, page_offset(page), &from, &err);
 
 	end_page_writeback(page);
 	return err;
@@ -251,7 +251,7 @@ static int v9fs_launder_page(struct page *page)
 	ssize_t n;
 	int err = 0;
 	if (iov_iter_rw(iter) == WRITE) {
-		n = p9_client_write(file->private_data, pos, iter, &err);
+		n = p9_client_write(file->private_data, iocb, pos, iter, &err);
 		if (n) {
 			struct inode *inode = file_inode(file);
 			loff_t i_size = i_size_read(inode);
@@ -259,7 +259,7 @@ static int v9fs_launder_page(struct page *page)
 				inode_add_bytes(inode, pos + n - i_size);
 		}
 	} else {
-		n = p9_client_read(file->private_data, pos, iter, &err);
+		n = p9_client_read(file->private_data, iocb, pos, iter, &err);
 	}
 	return n ? n : err;
 }
diff --git a/fs/9p/vfs_dir.c b/fs/9p/vfs_dir.c
index b0405d6..68557e0 100644
--- a/fs/9p/vfs_dir.c
+++ b/fs/9p/vfs_dir.c
@@ -134,7 +134,7 @@ static int v9fs_dir_readdir(struct file *file, struct dir_context *ctx)
 			struct iov_iter to;
 			int n;
 			iov_iter_kvec(&to, READ | ITER_KVEC, &kvec, 1, buflen);
-			n = p9_client_read(file->private_data, ctx->pos, &to,
+			n = p9_client_read(file->private_data, NULL, ctx->pos, &to,
 					   &err);
 			if (err)
 				return err;
diff --git a/fs/9p/vfs_file.c b/fs/9p/vfs_file.c
index d7b78d5..79e8c7d 100644
--- a/fs/9p/vfs_file.c
+++ b/fs/9p/vfs_file.c
@@ -387,7 +387,7 @@ static int v9fs_file_flock_dotl(struct file *filp, int cmd,
 	p9_debug(P9_DEBUG_VFS, "count %zu offset %lld\n",
 		 iov_iter_count(to), iocb->ki_pos);
 
-	ret = p9_client_read(fid, iocb->ki_pos, to, &err);
+	ret = p9_client_read(fid, iocb, iocb->ki_pos, to, &err);
 	if (!ret)
 		return err;
 
@@ -416,7 +416,7 @@ static int v9fs_file_flock_dotl(struct file *filp, int cmd,
 		return retval;
 
 	origin = iocb->ki_pos;
-	retval = p9_client_write(file->private_data, iocb->ki_pos, from, &err);
+	retval = p9_client_write(file->private_data, iocb, iocb->ki_pos, from, &err);
 	if (retval > 0) {
 		struct inode *inode = file_inode(file);
 		loff_t i_size;
diff --git a/fs/9p/xattr.c b/fs/9p/xattr.c
index f329eee..5e137c0 100644
--- a/fs/9p/xattr.c
+++ b/fs/9p/xattr.c
@@ -48,7 +48,7 @@ ssize_t v9fs_fid_xattr_get(struct p9_fid *fid, const char *name,
 			retval = -ERANGE;
 	} else {
 		iov_iter_truncate(&to, attr_size);
-		retval = p9_client_read(attr_fid, 0, &to, &err);
+		retval = p9_client_read(attr_fid, NULL, 0, &to, &err);
 		if (err)
 			retval = err;
 	}
@@ -125,7 +125,7 @@ int v9fs_fid_xattr_set(struct p9_fid *fid, const char *name,
 		p9_debug(P9_DEBUG_VFS, "p9_client_xattrcreate failed %d\n",
 			 retval);
 	else
-		p9_client_write(fid, 0, &from, &retval);
+		p9_client_write(fid, NULL, 0, &from, &retval);
 	p9_client_clunk(fid);
 	return retval;
 }
diff --git a/include/net/9p/client.h b/include/net/9p/client.h
index c6b97e5..aef19c6 100644
--- a/include/net/9p/client.h
+++ b/include/net/9p/client.h
@@ -26,6 +26,7 @@
 #ifndef NET_9P_CLIENT_H
 #define NET_9P_CLIENT_H
 
+#include <linux/fs.h>
 #include <linux/utsname.h>
 
 /* Number of requests per row */
@@ -238,8 +239,10 @@ int p9_client_create_dotl(struct p9_fid *ofid, char *name, u32 flags, u32 mode,
 int p9_client_fsync(struct p9_fid *fid, int datasync);
 int p9_client_remove(struct p9_fid *fid);
 int p9_client_unlinkat(struct p9_fid *dfid, const char *name, int flags);
-int p9_client_read(struct p9_fid *fid, u64 offset, struct iov_iter *to, int *err);
-int p9_client_write(struct p9_fid *fid, u64 offset, struct iov_iter *from, int *err);
+int p9_client_read(struct p9_fid *fid, struct kiocb *iocb, u64 offset,
+                    struct iov_iter *to, int *err);
+int p9_client_write(struct p9_fid *fid, struct kiocb *iocb, u64 offset,
+                    struct iov_iter *from, int *err);
 int p9_client_readdir(struct p9_fid *fid, char *data, u32 count, u64 offset);
 int p9dirent_read(struct p9_client *clnt, char *buf, int len,
 		  struct p9_dirent *dirent);
diff --git a/net/9p/client.c b/net/9p/client.c
index 3fc94a4..b5ea9a3 100644
--- a/net/9p/client.c
+++ b/net/9p/client.c
@@ -1536,7 +1536,8 @@ int p9_client_unlinkat(struct p9_fid *dfid, const char *name, int flags)
 EXPORT_SYMBOL(p9_client_unlinkat);
 
 int
-p9_client_read(struct p9_fid *fid, u64 offset, struct iov_iter *to, int *err)
+p9_client_read(struct p9_fid *fid, struct kiocb *iocb, u64 offset,
+				struct iov_iter *to, int *err)
 {
 	struct p9_client *clnt = fid->clnt;
 	struct p9_req_t *req;
@@ -1616,7 +1617,8 @@ int p9_client_unlinkat(struct p9_fid *dfid, const char *name, int flags)
 EXPORT_SYMBOL(p9_client_read);
 
 int
-p9_client_write(struct p9_fid *fid, u64 offset, struct iov_iter *from, int *err)
+p9_client_write(struct p9_fid *fid, struct kiocb *iocb, u64 offset,
+				struct iov_iter *from, int *err)
 {
 	struct p9_client *clnt = fid->clnt;
 	struct p9_req_t *req;
-- 
1.9.1