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xfs: mark inodes dirty before issuing I/O

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To make sure they get properly waited on in sync when I/O is in flight and
we latter need to update the inode size.  Requires a new helper to check if an
ioend structure is beyond the current EOF.

Signed-off-by: Dave Chinner <david@fromorbit.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Alex Elder <aelder@sgi.com>
Signed-off-by: Alex Elder <aelder@sgi.com>
This commit is contained in:
Dave Chinner 2009-10-06 20:29:29 +00:00 committed by Alex Elder
parent 69961a26b8
commit 932640e8ad
1 changed files with 28 additions and 9 deletions
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37
fs/xfs/linux-2.6/xfs_aops.c
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@ -185,6 +185,24 @@ xfs_destroy_ioend(
mempool_free(ioend, xfs_ioend_pool);
}
/*
* If the end of the current ioend is beyond the current EOF,
* return the new EOF value, otherwise zero.
*/
STATIC xfs_fsize_t
xfs_ioend_new_eof(
xfs_ioend_t *ioend)
{
xfs_inode_t *ip = XFS_I(ioend->io_inode);
xfs_fsize_t isize;
xfs_fsize_t bsize;
bsize = ioend->io_offset + ioend->io_size;
isize = MAX(ip->i_size, ip->i_new_size);
isize = MIN(isize, bsize);
return isize > ip->i_d.di_size ? isize : 0;
}
/*
* Update on-disk file size now that data has been written to disk.
* The current in-memory file size is i_size. If a write is beyond
@ -192,13 +210,13 @@ xfs_destroy_ioend(
* updated. If this write does not extend all the way to the valid
* file size then restrict this update to the end of the write.
*/
STATIC void
xfs_setfilesize(
xfs_ioend_t *ioend)
{
xfs_inode_t *ip = XFS_I(ioend->io_inode);
xfs_fsize_t isize;
xfs_fsize_t bsize;
ASSERT((ip->i_d.di_mode & S_IFMT) == S_IFREG);
ASSERT(ioend->io_type != IOMAP_READ);
@ -206,14 +224,9 @@ xfs_setfilesize(
if (unlikely(ioend->io_error))
return;
bsize = ioend->io_offset + ioend->io_size;
xfs_ilock(ip, XFS_ILOCK_EXCL);
isize = MAX(ip->i_size, ip->i_new_size);
isize = MIN(isize, bsize);
if (ip->i_d.di_size < isize) {
isize = xfs_ioend_new_eof(ioend);
if (isize) {
ip->i_d.di_size = isize;
xfs_mark_inode_dirty_sync(ip);
}
@ -403,10 +416,16 @@ xfs_submit_ioend_bio(
struct bio *bio)
{
atomic_inc(&ioend->io_remaining);
bio->bi_private = ioend;
bio->bi_end_io = xfs_end_bio;
/*
* If the I/O is beyond EOF we mark the inode dirty immediately
* but don't update the inode size until I/O completion.
*/
if (xfs_ioend_new_eof(ioend))
xfs_mark_inode_dirty_sync(XFS_I(ioend->io_inode));
submit_bio(WRITE, bio);
ASSERT(!bio_flagged(bio, BIO_EOPNOTSUPP));
bio_put(bio);