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authorJan Kara <jack@suse.cz>2023-01-24 11:59:32 +0100
committerJan Kara <jack@suse.cz>2023-01-26 16:46:35 +0100
commitd5abfb1b7b26086db19ee430dea7282f01d4ef44 (patch)
tree72efb488b61b015e89e43ea65cfbd7ffcc437aa3 /fs/udf
parent79d3c6dbada4a20193467f72c531ab99c173bf4f (diff)
udf: Convert in-ICB files to use udf_direct_IO()
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, make in-ICB files use udf_direct_IO(). Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/udf')
-rw-r--r--fs/udf/file.c8
-rw-r--r--fs/udf/inode.c5
-rw-r--r--fs/udf/udfdecl.h1
3 files changed, 6 insertions, 8 deletions
diff --git a/fs/udf/file.c b/fs/udf/file.c
index 7a8dbad86e41..6bab6aa7770a 100644
--- a/fs/udf/file.c
+++ b/fs/udf/file.c
@@ -76,12 +76,6 @@ static int udf_adinicb_write_begin(struct file *file,
return 0;
}
-static ssize_t udf_adinicb_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
-{
- /* Fallback to buffered I/O. */
- return 0;
-}
-
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)
@@ -103,7 +97,7 @@ const struct address_space_operations udf_adinicb_aops = {
.writepages = udf_writepages,
.write_begin = udf_adinicb_write_begin,
.write_end = udf_adinicb_write_end,
- .direct_IO = udf_adinicb_direct_IO,
+ .direct_IO = udf_direct_IO,
};
static vm_fault_t udf_page_mkwrite(struct vm_fault *vmf)
diff --git a/fs/udf/inode.c b/fs/udf/inode.c
index f0ab4dd0d8ce..d01b97e9e4f4 100644
--- a/fs/udf/inode.c
+++ b/fs/udf/inode.c
@@ -243,7 +243,7 @@ static int udf_write_begin(struct file *file, struct address_space *mapping,
return ret;
}
-static ssize_t udf_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
+ssize_t udf_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
{
struct file *file = iocb->ki_filp;
struct address_space *mapping = file->f_mapping;
@@ -251,6 +251,9 @@ static ssize_t udf_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
size_t count = iov_iter_count(iter);
ssize_t ret;
+ /* Fallback to buffered IO for in-ICB files */
+ if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
+ return 0;
ret = blockdev_direct_IO(iocb, inode, iter, udf_get_block);
if (unlikely(ret < 0 && iov_iter_rw(iter) == WRITE))
udf_write_failed(mapping, iocb->ki_pos + count);
diff --git a/fs/udf/udfdecl.h b/fs/udf/udfdecl.h
index 48647eab26a6..a851613465c6 100644
--- a/fs/udf/udfdecl.h
+++ b/fs/udf/udfdecl.h
@@ -161,6 +161,7 @@ extern void udf_evict_inode(struct inode *);
extern int udf_write_inode(struct inode *, struct writeback_control *wbc);
int udf_read_folio(struct file *file, struct folio *folio);
int udf_writepages(struct address_space *mapping, struct writeback_control *wbc);
+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 *);
int udf_get_block(struct inode *, sector_t, struct buffer_head *, int);