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authorTrond Myklebust <trond.myklebust@hammerspace.com>2020-03-21 09:36:13 -0400
committerTrond Myklebust <trond.myklebust@hammerspace.com>2020-03-27 16:34:34 -0400
commitfb5f7f20cdb91f8ef985aef09fa2217c49c38396 (patch)
tree1a83ffc978c1f2a9383f5b4f3f69206e4c3e75c1 /fs
parent18f412969687ded8f1debd21da758b041993e974 (diff)
downloadlinux-fb5f7f20cdb91f8ef985aef09fa2217c49c38396.tar.bz2
NFS: commit errors should be fatal
Fix the O_DIRECT code to avoid retries if the COMMIT fails with a fatal error. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/nfs/direct.c32
1 files changed, 30 insertions, 2 deletions
diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index 7ef7f71ae315..f7bf1181b690 100644
--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -94,6 +94,7 @@ struct nfs_direct_req {
#define NFS_ODIRECT_RESCHED_WRITES (2) /* write verification failed */
/* for read */
#define NFS_ODIRECT_SHOULD_DIRTY (3) /* dirty user-space page after read */
+#define NFS_ODIRECT_DONE INT_MAX /* write verification failed */
struct nfs_writeverf verf; /* unstable write verifier */
};
@@ -678,8 +679,17 @@ static void nfs_direct_commit_complete(struct nfs_commit_data *data)
struct nfs_page *req;
int status = data->task.tk_status;
+ if (status < 0) {
+ /* Errors in commit are fatal */
+ dreq->error = status;
+ dreq->max_count = 0;
+ dreq->count = 0;
+ dreq->flags = NFS_ODIRECT_DONE;
+ } else if (dreq->flags == NFS_ODIRECT_DONE)
+ status = dreq->error;
+
nfs_init_cinfo_from_dreq(&cinfo, dreq);
- if (status < 0 || nfs_direct_cmp_commit_data_verf(dreq, data))
+ if (nfs_direct_cmp_commit_data_verf(dreq, data))
dreq->flags = NFS_ODIRECT_RESCHED_WRITES;
while (!list_empty(&data->pages)) {
@@ -708,7 +718,8 @@ static void nfs_direct_resched_write(struct nfs_commit_info *cinfo,
struct nfs_direct_req *dreq = cinfo->dreq;
spin_lock(&dreq->lock);
- dreq->flags = NFS_ODIRECT_RESCHED_WRITES;
+ if (dreq->flags != NFS_ODIRECT_DONE)
+ dreq->flags = NFS_ODIRECT_RESCHED_WRITES;
spin_unlock(&dreq->lock);
nfs_mark_request_commit(req, NULL, cinfo, 0);
}
@@ -731,6 +742,22 @@ static void nfs_direct_commit_schedule(struct nfs_direct_req *dreq)
nfs_direct_write_reschedule(dreq);
}
+static void nfs_direct_write_clear_reqs(struct nfs_direct_req *dreq)
+{
+ struct nfs_commit_info cinfo;
+ struct nfs_page *req;
+ LIST_HEAD(reqs);
+
+ nfs_init_cinfo_from_dreq(&cinfo, dreq);
+ nfs_direct_write_scan_commit_list(dreq->inode, &reqs, &cinfo);
+
+ while (!list_empty(&reqs)) {
+ req = nfs_list_entry(reqs.next);
+ nfs_list_remove_request(req);
+ nfs_unlock_and_release_request(req);
+ }
+}
+
static void nfs_direct_write_schedule_work(struct work_struct *work)
{
struct nfs_direct_req *dreq = container_of(work, struct nfs_direct_req, work);
@@ -745,6 +772,7 @@ static void nfs_direct_write_schedule_work(struct work_struct *work)
nfs_direct_write_reschedule(dreq);
break;
default:
+ nfs_direct_write_clear_reqs(dreq);
nfs_zap_mapping(dreq->inode, dreq->inode->i_mapping);
nfs_direct_complete(dreq);
}