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NFS: Ensure that the read code cleans up properly when rpc_run_task() fails

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In the case of readpage() we need to ensure that the pages get unlocked,
and that the error is flagged.

In the case of O_DIRECT, we need to ensure that the pages are all released.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Trond Myklebust
2008-04-15 16:33:58 -04:00
parent 73e3302f60
commit fdd1e74c89
2 changed files with 46 additions and 26 deletions
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19
fs/nfs/direct.c
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@@ -229,14 +229,20 @@ static void nfs_direct_complete(struct nfs_direct_req *dreq)
static void nfs_direct_read_result(struct rpc_task *task, void *calldata)
{
struct nfs_read_data *data = calldata;
struct nfs_direct_req *dreq = (struct nfs_direct_req *) data->req;
if (nfs_readpage_result(task, data) != 0)
return;
nfs_readpage_result(task, data);
}
static void nfs_direct_read_release(void *calldata)
{
struct nfs_read_data *data = calldata;
struct nfs_direct_req *dreq = (struct nfs_direct_req *) data->req;
int status = data->task.tk_status;
spin_lock(&dreq->lock);
if (unlikely(task->tk_status < 0)) {
dreq->error = task->tk_status;
if (unlikely(status < 0)) {
dreq->error = status;
spin_unlock(&dreq->lock);
} else {
dreq->count += data->res.count;
@@ -249,11 +255,12 @@ static void nfs_direct_read_result(struct rpc_task *task, void *calldata)
if (put_dreq(dreq))
nfs_direct_complete(dreq);
nfs_readdata_release(calldata);
}
static const struct rpc_call_ops nfs_read_direct_ops = {
.rpc_call_done = nfs_direct_read_result,
.rpc_release = nfs_readdata_release,
.rpc_release = nfs_direct_read_release,
};
/*