nfsd: use get_acl and ->set_acl

Remove the boilerplate code to marshall and unmarhall ACL objects into
xattrs and operate on the posix_acl objects directly.  Also move all
the ACL handling code into nfs?acl.c where it belongs.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 33 insertions, 29 deletions

diff --git a/fs/nfsd/nfs3acl.c b/fs/nfsd/nfs3acl.c
index 9cbc1a841f87..adc5f1b1dc26 100644
--- a/fs/nfsd/nfs3acl.c
+++ b/fs/nfsd/nfs3acl.c
@@ -29,8 +29,9 @@ nfsd3_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
 static __be32 nfsd3_proc_getacl(struct svc_rqst * rqstp,
                 struct nfsd3_getaclargs *argp, struct nfsd3_getaclres *resp)
 {
-        svc_fh *fh;
         struct posix_acl *acl;
+        struct inode *inode;
+        svc_fh *fh;
         __be32 nfserr = 0;
 
         fh = fh_copy(&resp->fh, &argp->fh);
@@ -38,26 +39,20 @@ static __be32 nfsd3_proc_getacl(struct svc_rqst * rqstp,
         if (nfserr)
                 RETURN_STATUS(nfserr);
 
+        inode = fh->fh_dentry->d_inode;
+
         if (argp->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT))
                 RETURN_STATUS(nfserr_inval);
         resp->mask = argp->mask;
 
         if (resp->mask & (NFS_ACL|NFS_ACLCNT)) {
-                acl = nfsd_get_posix_acl(fh, ACL_TYPE_ACCESS);
+                acl = get_acl(inode, ACL_TYPE_ACCESS);
                 if (IS_ERR(acl)) {
-                        int err = PTR_ERR(acl);
-
-                        if (err == -ENODATA || err == -EOPNOTSUPP)
-                                acl = NULL;
-                        else {
-                                nfserr = nfserrno(err);
-                                goto fail;
-                        }
+                        nfserr = nfserrno(PTR_ERR(acl));
+                        goto fail;
                 }
                 if (acl == NULL) {
                         /* Solaris returns the inode's minimum ACL. */
-
-                        struct inode *inode = fh->fh_dentry->d_inode;
                         acl = posix_acl_from_mode(inode->i_mode, GFP_KERNEL);
                 }
                 resp->acl_access = acl;
@@ -65,17 +60,10 @@ static __be32 nfsd3_proc_getacl(struct svc_rqst * rqstp,
         if (resp->mask & (NFS_DFACL|NFS_DFACLCNT)) {
                 /* Check how Solaris handles requests for the Default ACL
                    of a non-directory! */
-
-                acl = nfsd_get_posix_acl(fh, ACL_TYPE_DEFAULT);
+                acl = get_acl(inode, ACL_TYPE_DEFAULT);
                 if (IS_ERR(acl)) {
-                        int err = PTR_ERR(acl);
-
-                        if (err == -ENODATA || err == -EOPNOTSUPP)
-                                acl = NULL;
-                        else {
-                                nfserr = nfserrno(err);
-                                goto fail;
-                        }
+                        nfserr = nfserrno(PTR_ERR(acl));
+                        goto fail;
                 }
                 resp->acl_default = acl;
         }
@@ -96,21 +84,37 @@ static __be32 nfsd3_proc_setacl(struct svc_rqst * rqstp,
                 struct nfsd3_setaclargs *argp,
                 struct nfsd3_attrstat *resp)
 {
+        struct inode *inode;
         svc_fh *fh;
         __be32 nfserr = 0;
+        int error;
 
         fh = fh_copy(&resp->fh, &argp->fh);
         nfserr = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_SATTR);
+        if (nfserr)
+                goto out;
 
-        if (!nfserr) {
-                nfserr = nfserrno( nfsd_set_posix_acl(
-                        fh, ACL_TYPE_ACCESS, argp->acl_access) );
-        }
-        if (!nfserr) {
-                nfserr = nfserrno( nfsd_set_posix_acl(
-                        fh, ACL_TYPE_DEFAULT, argp->acl_default) );
+        inode = fh->fh_dentry->d_inode;
+        if (!IS_POSIXACL(inode) || !inode->i_op->set_acl) {
+                error = -EOPNOTSUPP;
+                goto out_errno;
         }
 
+        error = fh_want_write(fh);
+        if (error)
+                goto out_errno;
+
+        error = inode->i_op->set_acl(inode, argp->acl_access, ACL_TYPE_ACCESS);
+        if (error)
+                goto out_drop_write;
+        error = inode->i_op->set_acl(inode, argp->acl_default,
+                                     ACL_TYPE_DEFAULT);
+
+out_drop_write:
+        fh_drop_write(fh);
+out_errno:
+        nfserr = nfserrno(error);
+out:
         /* argp->acl_{access,default} may have been allocated in
            nfs3svc_decode_setaclargs. */
         posix_acl_release(argp->acl_access);