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authorTrond Myklebust <trond.myklebust@hammerspace.com>2020-12-01 01:03:17 +0300
committerChuck Lever <chuck.lever@oracle.com>2020-12-09 17:39:38 +0300
commitd045465fc6cbfa4acfb5a7d817a7c1a57a078109 (patch)
tree9e96b277975790584fed7dd87ea353ff749b3545 /fs/exportfs
parent7f84b488f9add1d5cca3e6197c95914c7bd3c1cf (diff)
downloadlinux-d045465fc6cbfa4acfb5a7d817a7c1a57a078109.tar.xz
exportfs: Add a function to return the raw output from fh_to_dentry()
In order to allow nfsd to accept return values that are not acceptable to overlayfs and others, add a new function. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Diffstat (limited to 'fs/exportfs')
-rw-r--r--fs/exportfs/expfs.c32
1 files changed, 24 insertions, 8 deletions
diff --git a/fs/exportfs/expfs.c b/fs/exportfs/expfs.c
index 2dd55b172d57..0106eba46d5a 100644
--- a/fs/exportfs/expfs.c
+++ b/fs/exportfs/expfs.c
@@ -417,9 +417,11 @@ int exportfs_encode_fh(struct dentry *dentry, struct fid *fid, int *max_len,
}
EXPORT_SYMBOL_GPL(exportfs_encode_fh);
-struct dentry *exportfs_decode_fh(struct vfsmount *mnt, struct fid *fid,
- int fh_len, int fileid_type,
- int (*acceptable)(void *, struct dentry *), void *context)
+struct dentry *
+exportfs_decode_fh_raw(struct vfsmount *mnt, struct fid *fid, int fh_len,
+ int fileid_type,
+ int (*acceptable)(void *, struct dentry *),
+ void *context)
{
const struct export_operations *nop = mnt->mnt_sb->s_export_op;
struct dentry *result, *alias;
@@ -432,10 +434,8 @@ struct dentry *exportfs_decode_fh(struct vfsmount *mnt, struct fid *fid,
if (!nop || !nop->fh_to_dentry)
return ERR_PTR(-ESTALE);
result = nop->fh_to_dentry(mnt->mnt_sb, fid, fh_len, fileid_type);
- if (PTR_ERR(result) == -ENOMEM)
- return ERR_CAST(result);
if (IS_ERR_OR_NULL(result))
- return ERR_PTR(-ESTALE);
+ return result;
/*
* If no acceptance criteria was specified by caller, a disconnected
@@ -561,10 +561,26 @@ struct dentry *exportfs_decode_fh(struct vfsmount *mnt, struct fid *fid,
err_result:
dput(result);
- if (err != -ENOMEM)
- err = -ESTALE;
return ERR_PTR(err);
}
+EXPORT_SYMBOL_GPL(exportfs_decode_fh_raw);
+
+struct dentry *exportfs_decode_fh(struct vfsmount *mnt, struct fid *fid,
+ int fh_len, int fileid_type,
+ int (*acceptable)(void *, struct dentry *),
+ void *context)
+{
+ struct dentry *ret;
+
+ ret = exportfs_decode_fh_raw(mnt, fid, fh_len, fileid_type,
+ acceptable, context);
+ if (IS_ERR_OR_NULL(ret)) {
+ if (ret == ERR_PTR(-ENOMEM))
+ return ret;
+ return ERR_PTR(-ESTALE);
+ }
+ return ret;
+}
EXPORT_SYMBOL_GPL(exportfs_decode_fh);
MODULE_LICENSE("GPL");