NFS: Reduce stack footprint of nfs3_proc_getacl() and nfs3_proc_setacl()

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

diff --git a/fs/nfs/nfs3acl.c b/fs/nfs/nfs3acl.c
index d150ae0..9f88c5f 100644 (file)
--- a/fs/nfs/nfs3acl.c
+++ b/fs/nfs/nfs3acl.c
@@ -185,7 +185,6 @@ static void nfs3_cache_acls(struct inode *inode, struct posix_acl *acl,
 struct posix_acl *nfs3_proc_getacl(struct inode *inode, int type)
 {
        struct nfs_server *server = NFS_SERVER(inode);
-       struct nfs_fattr fattr;
        struct page *pages[NFSACL_MAXPAGES] = { };
        struct nfs3_getaclargs args = {
                .fh = NFS_FH(inode),
@@ -193,7 +192,7 @@ struct posix_acl *nfs3_proc_getacl(struct inode *inode, int type)
                .pages = pages,
        };
        struct nfs3_getaclres res = {
-               .fattr =        &fattr,
+               0
        };
        struct rpc_message msg = {
                .rpc_argp       = &args,
@@ -228,7 +227,10 @@ struct posix_acl *nfs3_proc_getacl(struct inode *inode, int type)
 
        dprintk("NFS call getacl\n");
        msg.rpc_proc = &server->client_acl->cl_procinfo[ACLPROC3_GETACL];
-       nfs_fattr_init(&fattr);
+       res.fattr = nfs_alloc_fattr();
+       if (res.fattr == NULL)
+               return ERR_PTR(-ENOMEM);
+
        status = rpc_call_sync(server->client_acl, &msg, 0);
        dprintk("NFS reply getacl: %d\n", status);
 
@@ -238,7 +240,7 @@ struct posix_acl *nfs3_proc_getacl(struct inode *inode, int type)
 
        switch (status) {
                case 0:
-                       status = nfs_refresh_inode(inode, &fattr);
+                       status = nfs_refresh_inode(inode, res.fattr);
                        break;
                case -EPFNOSUPPORT:
                case -EPROTONOSUPPORT:
@@ -278,6 +280,7 @@ struct posix_acl *nfs3_proc_getacl(struct inode *inode, int type)
 getout:
        posix_acl_release(res.acl_access);
        posix_acl_release(res.acl_default);
+       nfs_free_fattr(res.fattr);
 
        if (status != 0) {
                posix_acl_release(acl);
@@ -290,7 +293,7 @@ static int nfs3_proc_setacls(struct inode *inode, struct posix_acl *acl,
                  struct posix_acl *dfacl)
 {
        struct nfs_server *server = NFS_SERVER(inode);
-       struct nfs_fattr fattr;
+       struct nfs_fattr *fattr;
        struct page *pages[NFSACL_MAXPAGES];
        struct nfs3_setaclargs args = {
                .inode = inode,
@@ -335,8 +338,13 @@ static int nfs3_proc_setacls(struct inode *inode, struct posix_acl *acl,
        }
 
        dprintk("NFS call setacl\n");
+       status = -ENOMEM;
+       fattr = nfs_alloc_fattr();
+       if (fattr == NULL)
+               goto out_freepages;
+
        msg.rpc_proc = &server->client_acl->cl_procinfo[ACLPROC3_SETACL];
-       nfs_fattr_init(&fattr);
+       msg.rpc_resp = fattr;
        status = rpc_call_sync(server->client_acl, &msg, 0);
        nfs_access_zap_cache(inode);
        nfs_zap_acl_cache(inode);
@@ -344,7 +352,7 @@ static int nfs3_proc_setacls(struct inode *inode, struct posix_acl *acl,
 
        switch (status) {
                case 0:
-                       status = nfs_refresh_inode(inode, &fattr);
+                       status = nfs_refresh_inode(inode, fattr);
                        nfs3_cache_acls(inode, acl, dfacl);
                        break;
                case -EPFNOSUPPORT:
@@ -355,6 +363,7 @@ static int nfs3_proc_setacls(struct inode *inode, struct posix_acl *acl,
                case -ENOTSUPP:
                        status = -EOPNOTSUPP;
        }
+       nfs_free_fattr(fattr);
 out_freepages:
        while (args.npages != 0) {
                args.npages--;