Switching address_space_operations while a file is used is difficult to
do in a race-free way. To be able to use single address_space_operations
in UDF, create udf_write_end() function that is able to handle both
normal and in-ICB files.
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Signed-off-by: Jan Kara <jack@xxxxxxx>
---
fs/udf/file.c | 16 +---------------
fs/udf/inode.c | 22 +++++++++++++++++++++-
fs/udf/udfdecl.h | 3 +++
3 files changed, 25 insertions(+), 16 deletions(-)
diff --git a/fs/udf/file.c b/fs/udf/file.c
index 16aecf4b2387..8a37cd593883 100644
--- a/fs/udf/file.c
+++ b/fs/udf/file.c
@@ -57,27 +57,13 @@ void udf_adinicb_readpage(struct page *page)
kunmap_atomic(kaddr);
}
-static int udf_adinicb_write_end(struct file *file, struct address_space *mapping,
- loff_t pos, unsigned len, unsigned copied,
- struct page *page, void *fsdata)
-{
- struct inode *inode = page->mapping->host;
- loff_t last_pos = pos + copied;
- if (last_pos > inode->i_size)
- i_size_write(inode, last_pos);
- set_page_dirty(page);
- unlock_page(page);
- put_page(page);
- return copied;
-}
-
const struct address_space_operations udf_adinicb_aops = {
.dirty_folio = block_dirty_folio,
.invalidate_folio = block_invalidate_folio,
.read_folio = udf_read_folio,
.writepages = udf_writepages,
.write_begin = udf_write_begin,
- .write_end = udf_adinicb_write_end,
+ .write_end = udf_write_end,
.direct_IO = udf_direct_IO,
};
diff --git a/fs/udf/inode.c b/fs/udf/inode.c
index c165dd9714b9..ac00f2f5dbe3 100644
--- a/fs/udf/inode.c
+++ b/fs/udf/inode.c
@@ -257,6 +257,26 @@ int udf_write_begin(struct file *file, struct address_space *mapping,
return 0;
}
+int udf_write_end(struct file *file, struct address_space *mapping,
+ loff_t pos, unsigned len, unsigned copied,
+ struct page *page, void *fsdata)
+{
+ struct inode *inode = file_inode(file);
+ loff_t last_pos;
+
+ if (UDF_I(inode)->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB)
+ return generic_write_end(file, mapping, pos, len, copied, page,
+ fsdata);
+ last_pos = pos + copied;
+ if (last_pos > inode->i_size)
+ i_size_write(inode, last_pos);
+ set_page_dirty(page);
+ unlock_page(page);
+ put_page(page);
+
+ return copied;
+}
+
ssize_t udf_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
{
struct file *file = iocb->ki_filp;
@@ -286,7 +306,7 @@ const struct address_space_operations udf_aops = {
.readahead = udf_readahead,
.writepages = udf_writepages,
.write_begin = udf_write_begin,
- .write_end = generic_write_end,
+ .write_end = udf_write_end,
.direct_IO = udf_direct_IO,
.bmap = udf_bmap,
.migrate_folio = buffer_migrate_folio,
diff --git a/fs/udf/udfdecl.h b/fs/udf/udfdecl.h
index 32decf6b6a21..304c2ec81589 100644
--- a/fs/udf/udfdecl.h
+++ b/fs/udf/udfdecl.h
@@ -164,6 +164,9 @@ int udf_writepages(struct address_space *mapping, struct writeback_control *wbc)
int udf_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len,
struct page **pagep, void **fsdata);
+int udf_write_end(struct file *file, struct address_space *mapping,
+ loff_t pos, unsigned len, unsigned copied,
+ struct page *page, void *fsdata);
ssize_t udf_direct_IO(struct kiocb *iocb, struct iov_iter *iter);
extern int8_t inode_bmap(struct inode *, sector_t, struct extent_position *,
struct kernel_lb_addr *, uint32_t *, sector_t *);
--
2.35.3
