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direct-io: move aio_complete into ->end_io

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Filesystems with unwritten extent support must not complete an AIO request
until the transaction to convert the extent has been commited.  That means
the aio_complete calls needs to be moved into the ->end_io callback so
that the filesystem can control when to call it exactly.

This makes a bit of a mess out of dio_complete and the ->end_io callback
prototype even more complicated.

Signed-off-by: Christoph Hellwig <[email protected]>
Reviewed-by: Jan Kara <[email protected]>
Signed-off-by: Alex Elder <[email protected]>
This commit is contained in:
Christoph Hellwig 2010-07-18 21:17:09 +00:00 • committed by Alex Elder
commit 40e2e97316
6 changed files with 37 additions and 18 deletions
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7
fs/xfs/linux-2.6/xfs_aops.c
View file

@ -1406,7 +1406,9 @@ xfs_end_io_direct(
struct kiocb *iocb,
loff_t offset,
ssize_t size,
void *private)
void *private,
int ret,
bool is_async)
{
xfs_ioend_t *ioend = iocb->private;
@ -1452,6 +1454,9 @@ xfs_end_io_direct(
* against double-freeing.
*/
iocb->private = NULL;
if (is_async)
aio_complete(iocb, ret, 0);
}
STATIC ssize_t

2
fs/xfs/linux-2.6/xfs_aops.h
View file

@ -37,6 +37,8 @@ typedef struct xfs_ioend {
size_t io_size; /* size of the extent */
xfs_off_t io_offset; /* offset in the file */
struct work_struct io_work; /* xfsdatad work queue */
struct kiocb *io_iocb;
int io_result;
} xfs_ioend_t;
extern const struct address_space_operations xfs_address_space_operations;