[PATCH] NFS: Add support for NFSv3 ACLs
This adds acl support fo nfs clients via the NFSACL protocol extension, by
implementing the getxattr, listxattr, setxattr, and removexattr iops for the
system.posix_acl_access and system.posix_acl_default attributes. This patch
implements a dumb version that uses no caching (and thus adds some overhead).
(Another patch in this patchset adds caching as well.)
Signed-off-by: Andreas Gruenbacher <agruen@suse.de>
Acked-by: Olaf Kirch <okir@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index 97b3fe7..440b9cb 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -108,6 +108,21 @@
.pipe_dir_name = "/nfs",
};
+#ifdef CONFIG_NFS_V3_ACL
+static struct rpc_stat nfsacl_rpcstat = { &nfsacl_program };
+static struct rpc_version * nfsacl_version[] = {
+ [3] = &nfsacl_version3,
+};
+
+struct rpc_program nfsacl_program = {
+ .name = "nfsacl",
+ .number = NFS_ACL_PROGRAM,
+ .nrvers = sizeof(nfsacl_version) / sizeof(nfsacl_version[0]),
+ .version = nfsacl_version,
+ .stats = &nfsacl_rpcstat,
+};
+#endif /* CONFIG_NFS_V3_ACL */
+
static inline unsigned long
nfs_fattr_to_ino_t(struct nfs_fattr *fattr)
{
@@ -165,6 +180,9 @@
/* -EIO all pending I/O */
if (!IS_ERR(rpc))
rpc_killall_tasks(rpc);
+ rpc = NFS_SB(sb)->client_acl;
+ if (!IS_ERR(rpc))
+ rpc_killall_tasks(rpc);
}
@@ -461,8 +479,17 @@
atomic_inc(&server->client->cl_count);
server->client_sys = server->client;
}
-
if (server->flags & NFS_MOUNT_VER3) {
+#ifdef CONFIG_NFS_V3_ACL
+ if (!(server->flags & NFS_MOUNT_NOACL)) {
+ server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3);
+ /* No errors! Assume that Sun nfsacls are supported */
+ if (!IS_ERR(server->client_acl))
+ server->caps |= NFS_CAP_ACLS;
+ }
+#else
+ server->flags &= ~NFS_MOUNT_NOACL;
+#endif /* CONFIG_NFS_V3_ACL */
if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN)
server->namelen = NFS3_MAXNAMLEN;
sb->s_time_gran = 1;
@@ -546,6 +573,7 @@
{ NFS_MOUNT_NOCTO, ",nocto", "" },
{ NFS_MOUNT_NOAC, ",noac", "" },
{ NFS_MOUNT_NONLM, ",nolock", ",lock" },
+ { NFS_MOUNT_NOACL, ",noacl", "" },
{ 0, NULL, NULL }
};
struct proc_nfs_info *nfs_infop;
@@ -1452,7 +1480,7 @@
memset(server, 0, sizeof(struct nfs_server));
/* Zero out the NFS state stuff */
init_nfsv4_state(server);
- server->client = server->client_sys = ERR_PTR(-EINVAL);
+ server->client = server->client_sys = server->client_acl = ERR_PTR(-EINVAL);
root = &server->fh;
if (data->flags & NFS_MOUNT_VER3)
@@ -1513,6 +1541,8 @@
rpc_shutdown_client(server->client);
if (!IS_ERR(server->client_sys))
rpc_shutdown_client(server->client_sys);
+ if (!IS_ERR(server->client_acl))
+ rpc_shutdown_client(server->client_acl);
if (!(server->flags & NFS_MOUNT_NONLM))
lockd_down(); /* release rpc.lockd */
@@ -1794,7 +1824,7 @@
memset(server, 0, sizeof(struct nfs_server));
/* Zero out the NFS state stuff */
init_nfsv4_state(server);
- server->client = server->client_sys = ERR_PTR(-EINVAL);
+ server->client = server->client_sys = server->client_acl = ERR_PTR(-EINVAL);
p = nfs_copy_user_string(NULL, &data->hostname, 256);
if (IS_ERR(p))