fs: change write_begin/write_end interface to take struct kiocb *

Change the address_space_operations callbacks write_begin() and
write_end() to take struct kiocb * as the first argument instead of
struct file *.

Update all affected function prototypes, implementations, call sites,
and related documentation across VFS, filesystems, and block layer.

Part of a series refactoring address_space_operations write_begin and
write_end callbacks to use struct kiocb for passing write context and
flags.

Signed-off-by: Taotao Chen <chentaotao@didiglobal.com>
Link: https://lore.kernel.org/20250716093559.217344-4-chentaotao@didiglobal.com
Signed-off-by: Christian Brauner <brauner@kernel.org>

1 files changed, 6 insertions, 2 deletions

diff --git a/fs/nfs/file.c b/fs/nfs/file.c
index 033feeab8c34..2bd557ca1af9 100644
--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c
@@ -342,12 +342,14 @@ static bool nfs_want_read_modify_write(struct file *file, struct folio *folio,
  * If the writer ends up delaying the write, the writer needs to
  * increment the page use counts until he is done with the page.
  */
-static int nfs_write_begin(struct file *file, struct address_space *mapping,
+static int nfs_write_begin(const struct kiocb *iocb,
+			   struct address_space *mapping,
 			   loff_t pos, unsigned len, struct folio **foliop,
 			   void **fsdata)
 {
 	fgf_t fgp = FGP_WRITEBEGIN;
 	struct folio *folio;
+	struct file *file = iocb->ki_filp;
 	int once_thru = 0;
 	int ret;
 
@@ -377,10 +379,12 @@ start:
 	return ret;
 }
 
-static int nfs_write_end(struct file *file, struct address_space *mapping,
+static int nfs_write_end(const struct kiocb *iocb,
+			 struct address_space *mapping,
 			 loff_t pos, unsigned len, unsigned copied,
 			 struct folio *folio, void *fsdata)
 {
+	struct file *file = iocb->ki_filp;
 	struct nfs_open_context *ctx = nfs_file_open_context(file);
 	unsigned offset = offset_in_folio(folio, pos);
 	int status;