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xfs: improve ioend error handling

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Return unwritten extent conversion errors to aio_complete.

Skip both unwritten extent conversion and size updates if we had an
I/O error or the filesystem has been shut down.

Return -EIO to the aio/buffer completion handlers in case of a
forced shutdown.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Alex Elder <aelder@sgi.com>
This commit is contained in:
Christoph Hellwig 2011-08-24 05:59:25 +00:00 committed by Alex Elder
parent c58cb165bd
commit 04f658ee22
1 changed files with 17 additions and 10 deletions
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27
fs/xfs/xfs_aops.c
View file

@ -88,8 +88,10 @@ xfs_destroy_ioend(
}
if (ioend->io_iocb) {
if (ioend->io_isasync)
aio_complete(ioend->io_iocb, ioend->io_result, 0);
if (ioend->io_isasync) {
aio_complete(ioend->io_iocb, ioend->io_error ?
ioend->io_error : ioend->io_result, 0);
}
inode_dio_done(ioend->io_inode);
}
@ -141,9 +143,6 @@ xfs_setfilesize(
xfs_inode_t *ip = XFS_I(ioend->io_inode);
xfs_fsize_t isize;
if (unlikely(ioend->io_error))
return 0;
if (!xfs_ilock_nowait(ip, XFS_ILOCK_EXCL))
return EAGAIN;
@ -189,17 +188,24 @@ xfs_end_io(
struct xfs_inode *ip = XFS_I(ioend->io_inode);
int error = 0;
if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
error = -EIO;
goto done;
}
if (ioend->io_error)
goto done;
/*
* For unwritten extents we need to issue transactions to convert a
* range to normal written extens after the data I/O has finished.
*/
if (ioend->io_type == IO_UNWRITTEN &&
likely(!ioend->io_error && !XFS_FORCED_SHUTDOWN(ip->i_mount))) {
if (ioend->io_type == IO_UNWRITTEN) {
error = xfs_iomap_write_unwritten(ip, ioend->io_offset,
ioend->io_size);
if (error)
ioend->io_error = error;
if (error) {
ioend->io_error = -error;
goto done;
}
}
/*
@ -209,6 +215,7 @@ xfs_end_io(
error = xfs_setfilesize(ioend);
ASSERT(!error || error == EAGAIN);
done:
/*
* If we didn't complete processing of the ioend, requeue it to the
* tail of the workqueue for another attempt later. Otherwise destroy