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authorTrond Myklebust <trondmy@gmail.com>2020-01-14 12:06:34 -0500
committerAnna Schumaker <Anna.Schumaker@Netapp.com>2020-01-24 16:51:13 -0500
commitf7b37b8b139860ed786bf8ce4358290c6053d94d (patch)
tree698b3ba1c636ce876cf452a249d82b95fec0008b /fs/nfs/dir.c
parentfe1e8dbec11fcad3ae7a34e95fe483d4a2b018fc (diff)
NFS: Add softreval behaviour to nfs_lookup_revalidate()
If the server is unavaliable, we want to allow the revalidating lookup to time out, and to default to validating the cached dentry if the 'softreval' mount option is set. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'fs/nfs/dir.c')
-rw-r--r--fs/nfs/dir.c15
1 files changed, 11 insertions, 4 deletions
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index 9405eeadc3f3..bfc66f3f00e1 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -1142,10 +1142,17 @@ nfs_lookup_revalidate_dentry(struct inode *dir, struct dentry *dentry,
if (fhandle == NULL || fattr == NULL || IS_ERR(label))
goto out;
- ret = NFS_PROTO(dir)->lookup(dir, &dentry->d_name, fhandle, fattr, label);
+ ret = NFS_PROTO(dir)->lookup(dir, dentry, fhandle, fattr, label);
if (ret < 0) {
- if (ret == -ESTALE || ret == -ENOENT)
+ switch (ret) {
+ case -ESTALE:
+ case -ENOENT:
ret = 0;
+ break;
+ case -ETIMEDOUT:
+ if (NFS_SERVER(inode)->flags & NFS_MOUNT_SOFTREVAL)
+ ret = 1;
+ }
goto out;
}
ret = 0;
@@ -1408,7 +1415,7 @@ struct dentry *nfs_lookup(struct inode *dir, struct dentry * dentry, unsigned in
goto out;
trace_nfs_lookup_enter(dir, dentry, flags);
- error = NFS_PROTO(dir)->lookup(dir, &dentry->d_name, fhandle, fattr, label);
+ error = NFS_PROTO(dir)->lookup(dir, dentry, fhandle, fattr, label);
if (error == -ENOENT)
goto no_entry;
if (error < 0) {
@@ -1683,7 +1690,7 @@ nfs_add_or_obtain(struct dentry *dentry, struct nfs_fh *fhandle,
d_drop(dentry);
if (fhandle->size == 0) {
- error = NFS_PROTO(dir)->lookup(dir, &dentry->d_name, fhandle, fattr, NULL);
+ error = NFS_PROTO(dir)->lookup(dir, dentry, fhandle, fattr, NULL);
if (error)
goto out_error;
}