diff options
| author |   Trond Myklebust <trond.myklebust@hammerspace.com> | 2020-11-30 17:03:17 -0500 |
|---|---|---|
| committer |   Chuck Lever <chuck.lever@oracle.com> | 2020-12-09 09:39:38 -0500 |
| commit | d045465fc6cbfa4acfb5a7d817a7c1a57a078109 (patch) | |
| tree | 9e96b277975790584fed7dd87ea353ff749b3545 | |
| parent | nfsd: close cached files prior to a REMOVE or RENAME that would replace target (diff) | |
| download | linux-dev-d045465fc6cbfa4acfb5a7d817a7c1a57a078109.tar.xz linux-dev-d045465fc6cbfa4acfb5a7d817a7c1a57a078109.zip | |
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>
| -rw-r--r-- | fs/exportfs/expfs.c | 32 | ||||
| -rw-r--r-- | include/linux/exportfs.h | 5 |
2 files changed, 29 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"); diff --git a/include/linux/exportfs.h b/include/linux/exportfs.h index d829403ffd3b..846df3c96730 100644 --- a/include/linux/exportfs.h +++ b/include/linux/exportfs.h @@ -223,6 +223,11 @@ extern int exportfs_encode_inode_fh(struct inode *inode, struct fid *fid, int *max_len, struct inode *parent); extern int exportfs_encode_fh(struct dentry *dentry, struct fid *fid, int *max_len, int connectable); +extern 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); extern struct dentry *exportfs_decode_fh(struct vfsmount *mnt, struct fid *fid, int fh_len, int fileid_type, int (*acceptable)(void *, struct dentry *), void *context); |