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nfs: fix size updates for aio writes

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nfs_file_direct_write only updates the inode size if it succeeded and
returned the number of bytes written.  But in the AIO case nfs_direct_wait
turns the return value into -EIOCBQUEUED and we skip the size update.

Instead the aio completion path should updated it, which this patch
does.  The implementation is a little hacky because there is no obvious
way to find out we are called for a write in nfs_direct_complete.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This commit is contained in:
Christoph Hellwig 2013-11-14 08:50:28 -08:00 committed by Trond Myklebust
parent 78b19bae08
commit 9811cd57f4
1 changed files with 16 additions and 5 deletions
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21
fs/nfs/direct.c
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@ -222,12 +222,23 @@ out:
* Synchronous I/O uses a stack-allocated iocb. Thus we can't trust
* the iocb is still valid here if this is a synchronous request.
*/
static void nfs_direct_complete(struct nfs_direct_req *dreq)
static void nfs_direct_complete(struct nfs_direct_req *dreq, bool write)
{
struct inode *inode = dreq->inode;
if (dreq->iocb) {
loff_t pos = dreq->iocb->ki_pos + dreq->count;
long res = (long) dreq->error;
if (!res)
res = (long) dreq->count;
if (write) {
spin_lock(&inode->i_lock);
if (i_size_read(inode) < pos)
i_size_write(inode, pos);
spin_unlock(&inode->i_lock);
}
aio_complete(dreq->iocb, res, 0);
}
complete_all(&dreq->completion);
@ -272,7 +283,7 @@ static void nfs_direct_read_completion(struct nfs_pgio_header *hdr)
}
out_put:
if (put_dreq(dreq))
nfs_direct_complete(dreq);
nfs_direct_complete(dreq, false);
hdr->release(hdr);
}
@ -434,7 +445,7 @@ static ssize_t nfs_direct_read_schedule_iovec(struct nfs_direct_req *dreq,
}
if (put_dreq(dreq))
nfs_direct_complete(dreq);
nfs_direct_complete(dreq, false);
return 0;
}
@ -594,7 +605,7 @@ static void nfs_direct_write_schedule_work(struct work_struct *work)
break;
default:
nfs_inode_dio_write_done(dreq->inode);
nfs_direct_complete(dreq);
nfs_direct_complete(dreq, true);
}
}
@ -611,7 +622,7 @@ static void nfs_direct_write_schedule_work(struct work_struct *work)
static void nfs_direct_write_complete(struct nfs_direct_req *dreq, struct inode *inode)
{
nfs_inode_dio_write_done(inode);
nfs_direct_complete(dreq);
nfs_direct_complete(dreq, true);
}
#endif