File-copy from v4.4.100
This is the result of 'cp' from a linux-stable tree with the 'v4.4.100'
tag checked out (commit 26d6298789e695c9f627ce49a7bbd2286405798a) on
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Please refer to that tree for all history prior to this point.
Change-Id: I8a9ee2aea93cd29c52c847d0ce33091a73ae6afe
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
new file mode 100644
index 0000000..1cb50bb
--- /dev/null
+++ b/fs/nfs/nfs4xdr.c
@@ -0,0 +1,7531 @@
+/*
+ * fs/nfs/nfs4xdr.c
+ *
+ * Client-side XDR for NFSv4.
+ *
+ * Copyright (c) 2002 The Regents of the University of Michigan.
+ * All rights reserved.
+ *
+ * Kendrick Smith <kmsmith@umich.edu>
+ * Andy Adamson <andros@umich.edu>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <linux/param.h>
+#include <linux/time.h>
+#include <linux/mm.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/in.h>
+#include <linux/pagemap.h>
+#include <linux/proc_fs.h>
+#include <linux/kdev_t.h>
+#include <linux/module.h>
+#include <linux/utsname.h>
+#include <linux/sunrpc/clnt.h>
+#include <linux/sunrpc/msg_prot.h>
+#include <linux/sunrpc/gss_api.h>
+#include <linux/nfs.h>
+#include <linux/nfs4.h>
+#include <linux/nfs_fs.h>
+
+#include "nfs4_fs.h"
+#include "internal.h"
+#include "nfs4idmap.h"
+#include "nfs4session.h"
+#include "pnfs.h"
+#include "netns.h"
+
+#define NFSDBG_FACILITY NFSDBG_XDR
+
+/* Mapping from NFS error code to "errno" error code. */
+#define errno_NFSERR_IO EIO
+
+static int nfs4_stat_to_errno(int);
+
+/* NFSv4 COMPOUND tags are only wanted for debugging purposes */
+#ifdef DEBUG
+#define NFS4_MAXTAGLEN 20
+#else
+#define NFS4_MAXTAGLEN 0
+#endif
+
+/* lock,open owner id:
+ * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT >> 2)
+ */
+#define open_owner_id_maxsz (1 + 2 + 1 + 1 + 2)
+#define lock_owner_id_maxsz (1 + 1 + 4)
+#define decode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
+#define compound_encode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
+#define compound_decode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
+#define op_encode_hdr_maxsz (1)
+#define op_decode_hdr_maxsz (2)
+#define encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
+#define decode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
+#define encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
+#define decode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
+#define encode_putfh_maxsz (op_encode_hdr_maxsz + 1 + \
+ (NFS4_FHSIZE >> 2))
+#define decode_putfh_maxsz (op_decode_hdr_maxsz)
+#define encode_putrootfh_maxsz (op_encode_hdr_maxsz)
+#define decode_putrootfh_maxsz (op_decode_hdr_maxsz)
+#define encode_getfh_maxsz (op_encode_hdr_maxsz)
+#define decode_getfh_maxsz (op_decode_hdr_maxsz + 1 + \
+ ((3+NFS4_FHSIZE) >> 2))
+#define nfs4_fattr_bitmap_maxsz 4
+#define encode_getattr_maxsz (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
+#define nfs4_name_maxsz (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
+#define nfs4_path_maxsz (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
+#define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
+#define nfs4_group_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
+#ifdef CONFIG_NFS_V4_SECURITY_LABEL
+/* PI(4 bytes) + LFS(4 bytes) + 1(for null terminator?) + MAXLABELLEN */
+#define nfs4_label_maxsz (4 + 4 + 1 + XDR_QUADLEN(NFS4_MAXLABELLEN))
+#else
+#define nfs4_label_maxsz 0
+#endif
+/* We support only one layout type per file system */
+#define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
+/* This is based on getfattr, which uses the most attributes: */
+#define nfs4_fattr_value_maxsz (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
+ 3 + 3 + 3 + nfs4_owner_maxsz + \
+ nfs4_group_maxsz + nfs4_label_maxsz + \
+ decode_mdsthreshold_maxsz))
+#define nfs4_fattr_maxsz (nfs4_fattr_bitmap_maxsz + \
+ nfs4_fattr_value_maxsz)
+#define decode_getattr_maxsz (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
+#define encode_attrs_maxsz (nfs4_fattr_bitmap_maxsz + \
+ 1 + 2 + 1 + \
+ nfs4_owner_maxsz + \
+ nfs4_group_maxsz + \
+ nfs4_label_maxsz + \
+ 4 + 4)
+#define encode_savefh_maxsz (op_encode_hdr_maxsz)
+#define decode_savefh_maxsz (op_decode_hdr_maxsz)
+#define encode_restorefh_maxsz (op_encode_hdr_maxsz)
+#define decode_restorefh_maxsz (op_decode_hdr_maxsz)
+#define encode_fsinfo_maxsz (encode_getattr_maxsz)
+/* The 5 accounts for the PNFS attributes, and assumes that at most three
+ * layout types will be returned.
+ */
+#define decode_fsinfo_maxsz (op_decode_hdr_maxsz + \
+ nfs4_fattr_bitmap_maxsz + 4 + 8 + 5)
+#define encode_renew_maxsz (op_encode_hdr_maxsz + 3)
+#define decode_renew_maxsz (op_decode_hdr_maxsz)
+#define encode_setclientid_maxsz \
+ (op_encode_hdr_maxsz + \
+ XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
+ /* client name */ \
+ 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
+ 1 /* sc_prog */ + \
+ 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
+ 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
+ 1) /* sc_cb_ident */
+#define decode_setclientid_maxsz \
+ (op_decode_hdr_maxsz + \
+ 2 /* clientid */ + \
+ XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
+ 1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
+ 1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN))
+#define encode_setclientid_confirm_maxsz \
+ (op_encode_hdr_maxsz + \
+ 3 + (NFS4_VERIFIER_SIZE >> 2))
+#define decode_setclientid_confirm_maxsz \
+ (op_decode_hdr_maxsz)
+#define encode_lookup_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
+#define decode_lookup_maxsz (op_decode_hdr_maxsz)
+#define encode_share_access_maxsz \
+ (2)
+#define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
+#define encode_opentype_maxsz (1 + encode_createmode_maxsz)
+#define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
+#define encode_open_maxsz (op_encode_hdr_maxsz + \
+ 2 + encode_share_access_maxsz + 2 + \
+ open_owner_id_maxsz + \
+ encode_opentype_maxsz + \
+ encode_claim_null_maxsz)
+#define decode_ace_maxsz (3 + nfs4_owner_maxsz)
+#define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
+ decode_ace_maxsz)
+#define decode_change_info_maxsz (5)
+#define decode_open_maxsz (op_decode_hdr_maxsz + \
+ decode_stateid_maxsz + \
+ decode_change_info_maxsz + 1 + \
+ nfs4_fattr_bitmap_maxsz + \
+ decode_delegation_maxsz)
+#define encode_open_confirm_maxsz \
+ (op_encode_hdr_maxsz + \
+ encode_stateid_maxsz + 1)
+#define decode_open_confirm_maxsz \
+ (op_decode_hdr_maxsz + \
+ decode_stateid_maxsz)
+#define encode_open_downgrade_maxsz \
+ (op_encode_hdr_maxsz + \
+ encode_stateid_maxsz + 1 + \
+ encode_share_access_maxsz)
+#define decode_open_downgrade_maxsz \
+ (op_decode_hdr_maxsz + \
+ decode_stateid_maxsz)
+#define encode_close_maxsz (op_encode_hdr_maxsz + \
+ 1 + encode_stateid_maxsz)
+#define decode_close_maxsz (op_decode_hdr_maxsz + \
+ decode_stateid_maxsz)
+#define encode_setattr_maxsz (op_encode_hdr_maxsz + \
+ encode_stateid_maxsz + \
+ encode_attrs_maxsz)
+#define decode_setattr_maxsz (op_decode_hdr_maxsz + \
+ nfs4_fattr_bitmap_maxsz)
+#define encode_read_maxsz (op_encode_hdr_maxsz + \
+ encode_stateid_maxsz + 3)
+#define decode_read_maxsz (op_decode_hdr_maxsz + 2)
+#define encode_readdir_maxsz (op_encode_hdr_maxsz + \
+ 2 + encode_verifier_maxsz + 5 + \
+ nfs4_label_maxsz)
+#define decode_readdir_maxsz (op_decode_hdr_maxsz + \
+ decode_verifier_maxsz)
+#define encode_readlink_maxsz (op_encode_hdr_maxsz)
+#define decode_readlink_maxsz (op_decode_hdr_maxsz + 1)
+#define encode_write_maxsz (op_encode_hdr_maxsz + \
+ encode_stateid_maxsz + 4)
+#define decode_write_maxsz (op_decode_hdr_maxsz + \
+ 2 + decode_verifier_maxsz)
+#define encode_commit_maxsz (op_encode_hdr_maxsz + 3)
+#define decode_commit_maxsz (op_decode_hdr_maxsz + \
+ decode_verifier_maxsz)
+#define encode_remove_maxsz (op_encode_hdr_maxsz + \
+ nfs4_name_maxsz)
+#define decode_remove_maxsz (op_decode_hdr_maxsz + \
+ decode_change_info_maxsz)
+#define encode_rename_maxsz (op_encode_hdr_maxsz + \
+ 2 * nfs4_name_maxsz)
+#define decode_rename_maxsz (op_decode_hdr_maxsz + \
+ decode_change_info_maxsz + \
+ decode_change_info_maxsz)
+#define encode_link_maxsz (op_encode_hdr_maxsz + \
+ nfs4_name_maxsz)
+#define decode_link_maxsz (op_decode_hdr_maxsz + decode_change_info_maxsz)
+#define encode_lockowner_maxsz (7)
+#define encode_lock_maxsz (op_encode_hdr_maxsz + \
+ 7 + \
+ 1 + encode_stateid_maxsz + 1 + \
+ encode_lockowner_maxsz)
+#define decode_lock_denied_maxsz \
+ (8 + decode_lockowner_maxsz)
+#define decode_lock_maxsz (op_decode_hdr_maxsz + \
+ decode_lock_denied_maxsz)
+#define encode_lockt_maxsz (op_encode_hdr_maxsz + 5 + \
+ encode_lockowner_maxsz)
+#define decode_lockt_maxsz (op_decode_hdr_maxsz + \
+ decode_lock_denied_maxsz)
+#define encode_locku_maxsz (op_encode_hdr_maxsz + 3 + \
+ encode_stateid_maxsz + \
+ 4)
+#define decode_locku_maxsz (op_decode_hdr_maxsz + \
+ decode_stateid_maxsz)
+#define encode_release_lockowner_maxsz \
+ (op_encode_hdr_maxsz + \
+ encode_lockowner_maxsz)
+#define decode_release_lockowner_maxsz \
+ (op_decode_hdr_maxsz)
+#define encode_access_maxsz (op_encode_hdr_maxsz + 1)
+#define decode_access_maxsz (op_decode_hdr_maxsz + 2)
+#define encode_symlink_maxsz (op_encode_hdr_maxsz + \
+ 1 + nfs4_name_maxsz + \
+ 1 + \
+ nfs4_fattr_maxsz)
+#define decode_symlink_maxsz (op_decode_hdr_maxsz + 8)
+#define encode_create_maxsz (op_encode_hdr_maxsz + \
+ 1 + 2 + nfs4_name_maxsz + \
+ encode_attrs_maxsz)
+#define decode_create_maxsz (op_decode_hdr_maxsz + \
+ decode_change_info_maxsz + \
+ nfs4_fattr_bitmap_maxsz)
+#define encode_statfs_maxsz (encode_getattr_maxsz)
+#define decode_statfs_maxsz (decode_getattr_maxsz)
+#define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
+#define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
+#define encode_getacl_maxsz (encode_getattr_maxsz)
+#define decode_getacl_maxsz (op_decode_hdr_maxsz + \
+ nfs4_fattr_bitmap_maxsz + 1)
+#define encode_setacl_maxsz (op_encode_hdr_maxsz + \
+ encode_stateid_maxsz + 3)
+#define decode_setacl_maxsz (decode_setattr_maxsz)
+#define encode_fs_locations_maxsz \
+ (encode_getattr_maxsz)
+#define decode_fs_locations_maxsz \
+ (0)
+#define encode_secinfo_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
+#define decode_secinfo_maxsz (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
+
+#if defined(CONFIG_NFS_V4_1)
+#define NFS4_MAX_MACHINE_NAME_LEN (64)
+#define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
+ sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
+
+#define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
+ encode_verifier_maxsz + \
+ 1 /* co_ownerid.len */ + \
+ /* eia_clientowner */ \
+ 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
+ 1 /* flags */ + \
+ 1 /* spa_how */ + \
+ /* max is SP4_MACH_CRED (for now) */ + \
+ 1 + NFS4_OP_MAP_NUM_WORDS + \
+ 1 + NFS4_OP_MAP_NUM_WORDS + \
+ 1 /* implementation id array of size 1 */ + \
+ 1 /* nii_domain */ + \
+ XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
+ 1 /* nii_name */ + \
+ XDR_QUADLEN(IMPL_NAME_LIMIT) + \
+ 3 /* nii_date */)
+#define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
+ 2 /* eir_clientid */ + \
+ 1 /* eir_sequenceid */ + \
+ 1 /* eir_flags */ + \
+ 1 /* spr_how */ + \
+ /* max is SP4_MACH_CRED (for now) */ + \
+ 1 + NFS4_OP_MAP_NUM_WORDS + \
+ 1 + NFS4_OP_MAP_NUM_WORDS + \
+ 2 /* eir_server_owner.so_minor_id */ + \
+ /* eir_server_owner.so_major_id<> */ \
+ XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
+ /* eir_server_scope<> */ \
+ XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
+ 1 /* eir_server_impl_id array length */ + \
+ 1 /* nii_domain */ + \
+ XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
+ 1 /* nii_name */ + \
+ XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
+ 3 /* nii_date */)
+#define encode_channel_attrs_maxsz (6 + 1 /* ca_rdma_ird.len (0) */)
+#define decode_channel_attrs_maxsz (6 + \
+ 1 /* ca_rdma_ird.len */ + \
+ 1 /* ca_rdma_ird */)
+#define encode_create_session_maxsz (op_encode_hdr_maxsz + \
+ 2 /* csa_clientid */ + \
+ 1 /* csa_sequence */ + \
+ 1 /* csa_flags */ + \
+ encode_channel_attrs_maxsz + \
+ encode_channel_attrs_maxsz + \
+ 1 /* csa_cb_program */ + \
+ 1 /* csa_sec_parms.len (1) */ + \
+ 1 /* cb_secflavor (AUTH_SYS) */ + \
+ 1 /* stamp */ + \
+ 1 /* machinename.len */ + \
+ XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
+ 1 /* uid */ + \
+ 1 /* gid */ + \
+ 1 /* gids.len (0) */)
+#define decode_create_session_maxsz (op_decode_hdr_maxsz + \
+ XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
+ 1 /* csr_sequence */ + \
+ 1 /* csr_flags */ + \
+ decode_channel_attrs_maxsz + \
+ decode_channel_attrs_maxsz)
+#define encode_bind_conn_to_session_maxsz (op_encode_hdr_maxsz + \
+ /* bctsa_sessid */ \
+ XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
+ 1 /* bctsa_dir */ + \
+ 1 /* bctsa_use_conn_in_rdma_mode */)
+#define decode_bind_conn_to_session_maxsz (op_decode_hdr_maxsz + \
+ /* bctsr_sessid */ \
+ XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
+ 1 /* bctsr_dir */ + \
+ 1 /* bctsr_use_conn_in_rdma_mode */)
+#define encode_destroy_session_maxsz (op_encode_hdr_maxsz + 4)
+#define decode_destroy_session_maxsz (op_decode_hdr_maxsz)
+#define encode_destroy_clientid_maxsz (op_encode_hdr_maxsz + 2)
+#define decode_destroy_clientid_maxsz (op_decode_hdr_maxsz)
+#define encode_sequence_maxsz (op_encode_hdr_maxsz + \
+ XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
+#define decode_sequence_maxsz (op_decode_hdr_maxsz + \
+ XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
+#define encode_reclaim_complete_maxsz (op_encode_hdr_maxsz + 4)
+#define decode_reclaim_complete_maxsz (op_decode_hdr_maxsz + 4)
+#define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + \
+ XDR_QUADLEN(NFS4_DEVICEID4_SIZE) + \
+ 1 /* layout type */ + \
+ 1 /* maxcount */ + \
+ 1 /* bitmap size */ + \
+ 1 /* notification bitmap length */ + \
+ 1 /* notification bitmap, word 0 */)
+#define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
+ 1 /* layout type */ + \
+ 1 /* opaque devaddr4 length */ + \
+ /* devaddr4 payload is read into page */ \
+ 1 /* notification bitmap length */ + \
+ 1 /* notification bitmap, word 0 */)
+#define encode_layoutget_maxsz (op_encode_hdr_maxsz + 10 + \
+ encode_stateid_maxsz)
+#define decode_layoutget_maxsz (op_decode_hdr_maxsz + 8 + \
+ decode_stateid_maxsz + \
+ XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
+#define encode_layoutcommit_maxsz (op_encode_hdr_maxsz + \
+ 2 /* offset */ + \
+ 2 /* length */ + \
+ 1 /* reclaim */ + \
+ encode_stateid_maxsz + \
+ 1 /* new offset (true) */ + \
+ 2 /* last byte written */ + \
+ 1 /* nt_timechanged (false) */ + \
+ 1 /* layoutupdate4 layout type */ + \
+ 1 /* layoutupdate4 opaqueue len */)
+ /* the actual content of layoutupdate4 should
+ be allocated by drivers and spliced in
+ using xdr_write_pages */
+#define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
+#define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
+ encode_stateid_maxsz + \
+ 1 + \
+ XDR_QUADLEN(NFS4_OPAQUE_LIMIT))
+#define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
+ 1 + decode_stateid_maxsz)
+#define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
+#define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
+#define encode_test_stateid_maxsz (op_encode_hdr_maxsz + 2 + \
+ XDR_QUADLEN(NFS4_STATEID_SIZE))
+#define decode_test_stateid_maxsz (op_decode_hdr_maxsz + 2 + 1)
+#define encode_free_stateid_maxsz (op_encode_hdr_maxsz + 1 + \
+ XDR_QUADLEN(NFS4_STATEID_SIZE))
+#define decode_free_stateid_maxsz (op_decode_hdr_maxsz)
+#else /* CONFIG_NFS_V4_1 */
+#define encode_sequence_maxsz 0
+#define decode_sequence_maxsz 0
+#endif /* CONFIG_NFS_V4_1 */
+
+#define NFS4_enc_compound_sz (1024) /* XXX: large enough? */
+#define NFS4_dec_compound_sz (1024) /* XXX: large enough? */
+#define NFS4_enc_read_sz (compound_encode_hdr_maxsz + \
+ encode_sequence_maxsz + \
+ encode_putfh_maxsz + \
+ encode_read_maxsz)
+#define NFS4_dec_read_sz (compound_decode_hdr_maxsz + \
+ decode_sequence_maxsz + \
+ decode_putfh_maxsz + \
+ decode_read_maxsz)
+#define NFS4_enc_readlink_sz (compound_encode_hdr_maxsz + \
+ encode_sequence_maxsz + \
+ encode_putfh_maxsz + \
+ encode_readlink_maxsz)
+#define NFS4_dec_readlink_sz (compound_decode_hdr_maxsz + \
+ decode_sequence_maxsz + \
+ decode_putfh_maxsz + \
+ decode_readlink_maxsz)
+#define NFS4_enc_readdir_sz (compound_encode_hdr_maxsz + \
+ encode_sequence_maxsz + \
+ encode_putfh_maxsz + \
+ encode_readdir_maxsz)
+#define NFS4_dec_readdir_sz (compound_decode_hdr_maxsz + \
+ decode_sequence_maxsz + \
+ decode_putfh_maxsz + \
+ decode_readdir_maxsz)
+#define NFS4_enc_write_sz (compound_encode_hdr_maxsz + \
+ encode_sequence_maxsz + \
+ encode_putfh_maxsz + \
+ encode_write_maxsz + \
+ encode_getattr_maxsz)
+#define NFS4_dec_write_sz (compound_decode_hdr_maxsz + \
+ decode_sequence_maxsz + \
+ decode_putfh_maxsz + \
+ decode_write_maxsz + \
+ decode_getattr_maxsz)
+#define NFS4_enc_commit_sz (compound_encode_hdr_maxsz + \
+ encode_sequence_maxsz + \
+ encode_putfh_maxsz + \
+ encode_commit_maxsz)
+#define NFS4_dec_commit_sz (compound_decode_hdr_maxsz + \
+ decode_sequence_maxsz + \
+ decode_putfh_maxsz + \
+ decode_commit_maxsz)
+#define NFS4_enc_open_sz (compound_encode_hdr_maxsz + \
+ encode_sequence_maxsz + \
+ encode_putfh_maxsz + \
+ encode_open_maxsz + \
+ encode_access_maxsz + \
+ encode_getfh_maxsz + \
+ encode_getattr_maxsz)
+#define NFS4_dec_open_sz (compound_decode_hdr_maxsz + \
+ decode_sequence_maxsz + \
+ decode_putfh_maxsz + \
+ decode_open_maxsz + \
+ decode_access_maxsz + \
+ decode_getfh_maxsz + \
+ decode_getattr_maxsz)
+#define NFS4_enc_open_confirm_sz \
+ (compound_encode_hdr_maxsz + \
+ encode_putfh_maxsz + \
+ encode_open_confirm_maxsz)
+#define NFS4_dec_open_confirm_sz \
+ (compound_decode_hdr_maxsz + \
+ decode_putfh_maxsz + \
+ decode_open_confirm_maxsz)
+#define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
+ encode_sequence_maxsz + \
+ encode_putfh_maxsz + \
+ encode_open_maxsz + \
+ encode_access_maxsz + \
+ encode_getattr_maxsz)
+#define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
+ decode_sequence_maxsz + \
+ decode_putfh_maxsz + \
+ decode_open_maxsz + \
+ decode_access_maxsz + \
+ decode_getattr_maxsz)
+#define NFS4_enc_open_downgrade_sz \
+ (compound_encode_hdr_maxsz + \
+ encode_sequence_maxsz + \
+ encode_putfh_maxsz + \
+ encode_open_downgrade_maxsz + \
+ encode_getattr_maxsz)
+#define NFS4_dec_open_downgrade_sz \
+ (compound_decode_hdr_maxsz + \
+ decode_sequence_maxsz + \
+ decode_putfh_maxsz + \
+ decode_open_downgrade_maxsz + \
+ decode_getattr_maxsz)
+#define NFS4_enc_close_sz (compound_encode_hdr_maxsz + \
+ encode_sequence_maxsz + \
+ encode_putfh_maxsz + \
+ encode_close_maxsz + \
+ encode_getattr_maxsz)
+#define NFS4_dec_close_sz (compound_decode_hdr_maxsz + \
+ decode_sequence_maxsz + \
+ decode_putfh_maxsz + \
+ decode_close_maxsz + \
+ decode_getattr_maxsz)
+#define NFS4_enc_setattr_sz (compound_encode_hdr_maxsz + \
+ encode_sequence_maxsz + \
+ encode_putfh_maxsz + \
+ encode_setattr_maxsz + \
+ encode_getattr_maxsz)
+#define NFS4_dec_setattr_sz (compound_decode_hdr_maxsz + \
+ decode_sequence_maxsz + \
+ decode_putfh_maxsz + \
+ decode_setattr_maxsz + \
+ decode_getattr_maxsz)
+#define NFS4_enc_fsinfo_sz (compound_encode_hdr_maxsz + \
+ encode_sequence_maxsz + \
+ encode_putfh_maxsz + \
+ encode_fsinfo_maxsz)
+#define NFS4_dec_fsinfo_sz (compound_decode_hdr_maxsz + \
+ decode_sequence_maxsz + \
+ decode_putfh_maxsz + \
+ decode_fsinfo_maxsz)
+#define NFS4_enc_renew_sz (compound_encode_hdr_maxsz + \
+ encode_renew_maxsz)
+#define NFS4_dec_renew_sz (compound_decode_hdr_maxsz + \
+ decode_renew_maxsz)
+#define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
+ encode_setclientid_maxsz)
+#define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
+ decode_setclientid_maxsz)
+#define NFS4_enc_setclientid_confirm_sz \
+ (compound_encode_hdr_maxsz + \
+ encode_setclientid_confirm_maxsz)
+#define NFS4_dec_setclientid_confirm_sz \
+ (compound_decode_hdr_maxsz + \
+ decode_setclientid_confirm_maxsz)
+#define NFS4_enc_lock_sz (compound_encode_hdr_maxsz + \
+ encode_sequence_maxsz + \
+ encode_putfh_maxsz + \
+ encode_lock_maxsz)
+#define NFS4_dec_lock_sz (compound_decode_hdr_maxsz + \
+ decode_sequence_maxsz + \
+ decode_putfh_maxsz + \
+ decode_lock_maxsz)
+#define NFS4_enc_lockt_sz (compound_encode_hdr_maxsz + \
+ encode_sequence_maxsz + \
+ encode_putfh_maxsz + \
+ encode_lockt_maxsz)
+#define NFS4_dec_lockt_sz (compound_decode_hdr_maxsz + \
+ decode_sequence_maxsz + \
+ decode_putfh_maxsz + \
+ decode_lockt_maxsz)
+#define NFS4_enc_locku_sz (compound_encode_hdr_maxsz + \
+ encode_sequence_maxsz + \
+ encode_putfh_maxsz + \
+ encode_locku_maxsz)
+#define NFS4_dec_locku_sz (compound_decode_hdr_maxsz + \
+ decode_sequence_maxsz + \
+ decode_putfh_maxsz + \
+ decode_locku_maxsz)
+#define NFS4_enc_release_lockowner_sz \
+ (compound_encode_hdr_maxsz + \
+ encode_lockowner_maxsz)
+#define NFS4_dec_release_lockowner_sz \
+ (compound_decode_hdr_maxsz + \
+ decode_lockowner_maxsz)
+#define NFS4_enc_access_sz (compound_encode_hdr_maxsz + \
+ encode_sequence_maxsz + \
+ encode_putfh_maxsz + \
+ encode_access_maxsz + \
+ encode_getattr_maxsz)
+#define NFS4_dec_access_sz (compound_decode_hdr_maxsz + \
+ decode_sequence_maxsz + \
+ decode_putfh_maxsz + \
+ decode_access_maxsz + \
+ decode_getattr_maxsz)
+#define NFS4_enc_getattr_sz (compound_encode_hdr_maxsz + \
+ encode_sequence_maxsz + \
+ encode_putfh_maxsz + \
+ encode_getattr_maxsz + \
+ encode_renew_maxsz)
+#define NFS4_dec_getattr_sz (compound_decode_hdr_maxsz + \
+ decode_sequence_maxsz + \
+ decode_putfh_maxsz + \
+ decode_getattr_maxsz + \
+ decode_renew_maxsz)
+#define NFS4_enc_lookup_sz (compound_encode_hdr_maxsz + \
+ encode_sequence_maxsz + \
+ encode_putfh_maxsz + \
+ encode_lookup_maxsz + \
+ encode_getattr_maxsz + \
+ encode_getfh_maxsz)
+#define NFS4_dec_lookup_sz (compound_decode_hdr_maxsz + \
+ decode_sequence_maxsz + \
+ decode_putfh_maxsz + \
+ decode_lookup_maxsz + \
+ decode_getattr_maxsz + \
+ decode_getfh_maxsz)
+#define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
+ encode_sequence_maxsz + \
+ encode_putrootfh_maxsz + \
+ encode_getattr_maxsz + \
+ encode_getfh_maxsz)
+#define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
+ decode_sequence_maxsz + \
+ decode_putrootfh_maxsz + \
+ decode_getattr_maxsz + \
+ decode_getfh_maxsz)
+#define NFS4_enc_remove_sz (compound_encode_hdr_maxsz + \
+ encode_sequence_maxsz + \
+ encode_putfh_maxsz + \
+ encode_remove_maxsz)
+#define NFS4_dec_remove_sz (compound_decode_hdr_maxsz + \
+ decode_sequence_maxsz + \
+ decode_putfh_maxsz + \
+ decode_remove_maxsz)
+#define NFS4_enc_rename_sz (compound_encode_hdr_maxsz + \
+ encode_sequence_maxsz + \
+ encode_putfh_maxsz + \
+ encode_savefh_maxsz + \
+ encode_putfh_maxsz + \
+ encode_rename_maxsz)
+#define NFS4_dec_rename_sz (compound_decode_hdr_maxsz + \
+ decode_sequence_maxsz + \
+ decode_putfh_maxsz + \
+ decode_savefh_maxsz + \
+ decode_putfh_maxsz + \
+ decode_rename_maxsz)
+#define NFS4_enc_link_sz (compound_encode_hdr_maxsz + \
+ encode_sequence_maxsz + \
+ encode_putfh_maxsz + \
+ encode_savefh_maxsz + \
+ encode_putfh_maxsz + \
+ encode_link_maxsz + \
+ encode_restorefh_maxsz + \
+ encode_getattr_maxsz)
+#define NFS4_dec_link_sz (compound_decode_hdr_maxsz + \
+ decode_sequence_maxsz + \
+ decode_putfh_maxsz + \
+ decode_savefh_maxsz + \
+ decode_putfh_maxsz + \
+ decode_link_maxsz + \
+ decode_restorefh_maxsz + \
+ decode_getattr_maxsz)
+#define NFS4_enc_symlink_sz (compound_encode_hdr_maxsz + \
+ encode_sequence_maxsz + \
+ encode_putfh_maxsz + \
+ encode_symlink_maxsz + \
+ encode_getattr_maxsz + \
+ encode_getfh_maxsz)
+#define NFS4_dec_symlink_sz (compound_decode_hdr_maxsz + \
+ decode_sequence_maxsz + \
+ decode_putfh_maxsz + \
+ decode_symlink_maxsz + \
+ decode_getattr_maxsz + \
+ decode_getfh_maxsz)
+#define NFS4_enc_create_sz (compound_encode_hdr_maxsz + \
+ encode_sequence_maxsz + \
+ encode_putfh_maxsz + \
+ encode_create_maxsz + \
+ encode_getfh_maxsz + \
+ encode_getattr_maxsz)
+#define NFS4_dec_create_sz (compound_decode_hdr_maxsz + \
+ decode_sequence_maxsz + \
+ decode_putfh_maxsz + \
+ decode_create_maxsz + \
+ decode_getfh_maxsz + \
+ decode_getattr_maxsz)
+#define NFS4_enc_pathconf_sz (compound_encode_hdr_maxsz + \
+ encode_sequence_maxsz + \
+ encode_putfh_maxsz + \
+ encode_getattr_maxsz)
+#define NFS4_dec_pathconf_sz (compound_decode_hdr_maxsz + \
+ decode_sequence_maxsz + \
+ decode_putfh_maxsz + \
+ decode_getattr_maxsz)
+#define NFS4_enc_statfs_sz (compound_encode_hdr_maxsz + \
+ encode_sequence_maxsz + \
+ encode_putfh_maxsz + \
+ encode_statfs_maxsz)
+#define NFS4_dec_statfs_sz (compound_decode_hdr_maxsz + \
+ decode_sequence_maxsz + \
+ decode_putfh_maxsz + \
+ decode_statfs_maxsz)
+#define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
+ encode_sequence_maxsz + \
+ encode_putfh_maxsz + \
+ encode_getattr_maxsz)
+#define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
+ decode_sequence_maxsz + \
+ decode_putfh_maxsz + \
+ decode_getattr_maxsz)
+#define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
+ encode_sequence_maxsz + \
+ encode_putfh_maxsz + \
+ encode_delegreturn_maxsz + \
+ encode_getattr_maxsz)
+#define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
+ decode_sequence_maxsz + \
+ decode_delegreturn_maxsz + \
+ decode_getattr_maxsz)
+#define NFS4_enc_getacl_sz (compound_encode_hdr_maxsz + \
+ encode_sequence_maxsz + \
+ encode_putfh_maxsz + \
+ encode_getacl_maxsz)
+#define NFS4_dec_getacl_sz (compound_decode_hdr_maxsz + \
+ decode_sequence_maxsz + \
+ decode_putfh_maxsz + \
+ decode_getacl_maxsz)
+#define NFS4_enc_setacl_sz (compound_encode_hdr_maxsz + \
+ encode_sequence_maxsz + \
+ encode_putfh_maxsz + \
+ encode_setacl_maxsz)
+#define NFS4_dec_setacl_sz (compound_decode_hdr_maxsz + \
+ decode_sequence_maxsz + \
+ decode_putfh_maxsz + \
+ decode_setacl_maxsz)
+#define NFS4_enc_fs_locations_sz \
+ (compound_encode_hdr_maxsz + \
+ encode_sequence_maxsz + \
+ encode_putfh_maxsz + \
+ encode_lookup_maxsz + \
+ encode_fs_locations_maxsz + \
+ encode_renew_maxsz)
+#define NFS4_dec_fs_locations_sz \
+ (compound_decode_hdr_maxsz + \
+ decode_sequence_maxsz + \
+ decode_putfh_maxsz + \
+ decode_lookup_maxsz + \
+ decode_fs_locations_maxsz + \
+ decode_renew_maxsz)
+#define NFS4_enc_secinfo_sz (compound_encode_hdr_maxsz + \
+ encode_sequence_maxsz + \
+ encode_putfh_maxsz + \
+ encode_secinfo_maxsz)
+#define NFS4_dec_secinfo_sz (compound_decode_hdr_maxsz + \
+ decode_sequence_maxsz + \
+ decode_putfh_maxsz + \
+ decode_secinfo_maxsz)
+#define NFS4_enc_fsid_present_sz \
+ (compound_encode_hdr_maxsz + \
+ encode_sequence_maxsz + \
+ encode_putfh_maxsz + \
+ encode_getfh_maxsz + \
+ encode_renew_maxsz)
+#define NFS4_dec_fsid_present_sz \
+ (compound_decode_hdr_maxsz + \
+ decode_sequence_maxsz + \
+ decode_putfh_maxsz + \
+ decode_getfh_maxsz + \
+ decode_renew_maxsz)
+#if defined(CONFIG_NFS_V4_1)
+#define NFS4_enc_bind_conn_to_session_sz \
+ (compound_encode_hdr_maxsz + \
+ encode_bind_conn_to_session_maxsz)
+#define NFS4_dec_bind_conn_to_session_sz \
+ (compound_decode_hdr_maxsz + \
+ decode_bind_conn_to_session_maxsz)
+#define NFS4_enc_exchange_id_sz \
+ (compound_encode_hdr_maxsz + \
+ encode_exchange_id_maxsz)
+#define NFS4_dec_exchange_id_sz \
+ (compound_decode_hdr_maxsz + \
+ decode_exchange_id_maxsz)
+#define NFS4_enc_create_session_sz \
+ (compound_encode_hdr_maxsz + \
+ encode_create_session_maxsz)
+#define NFS4_dec_create_session_sz \
+ (compound_decode_hdr_maxsz + \
+ decode_create_session_maxsz)
+#define NFS4_enc_destroy_session_sz (compound_encode_hdr_maxsz + \
+ encode_destroy_session_maxsz)
+#define NFS4_dec_destroy_session_sz (compound_decode_hdr_maxsz + \
+ decode_destroy_session_maxsz)
+#define NFS4_enc_destroy_clientid_sz (compound_encode_hdr_maxsz + \
+ encode_destroy_clientid_maxsz)
+#define NFS4_dec_destroy_clientid_sz (compound_decode_hdr_maxsz + \
+ decode_destroy_clientid_maxsz)
+#define NFS4_enc_sequence_sz \
+ (compound_decode_hdr_maxsz + \
+ encode_sequence_maxsz)
+#define NFS4_dec_sequence_sz \
+ (compound_decode_hdr_maxsz + \
+ decode_sequence_maxsz)
+#define NFS4_enc_get_lease_time_sz (compound_encode_hdr_maxsz + \
+ encode_sequence_maxsz + \
+ encode_putrootfh_maxsz + \
+ encode_fsinfo_maxsz)
+#define NFS4_dec_get_lease_time_sz (compound_decode_hdr_maxsz + \
+ decode_sequence_maxsz + \
+ decode_putrootfh_maxsz + \
+ decode_fsinfo_maxsz)
+#define NFS4_enc_reclaim_complete_sz (compound_encode_hdr_maxsz + \
+ encode_sequence_maxsz + \
+ encode_reclaim_complete_maxsz)
+#define NFS4_dec_reclaim_complete_sz (compound_decode_hdr_maxsz + \
+ decode_sequence_maxsz + \
+ decode_reclaim_complete_maxsz)
+#define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz + \
+ encode_sequence_maxsz +\
+ encode_getdeviceinfo_maxsz)
+#define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz + \
+ decode_sequence_maxsz + \
+ decode_getdeviceinfo_maxsz)
+#define NFS4_enc_layoutget_sz (compound_encode_hdr_maxsz + \
+ encode_sequence_maxsz + \
+ encode_putfh_maxsz + \
+ encode_layoutget_maxsz)
+#define NFS4_dec_layoutget_sz (compound_decode_hdr_maxsz + \
+ decode_sequence_maxsz + \
+ decode_putfh_maxsz + \
+ decode_layoutget_maxsz)
+#define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
+ encode_sequence_maxsz +\
+ encode_putfh_maxsz + \
+ encode_layoutcommit_maxsz + \
+ encode_getattr_maxsz)
+#define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
+ decode_sequence_maxsz + \
+ decode_putfh_maxsz + \
+ decode_layoutcommit_maxsz + \
+ decode_getattr_maxsz)
+#define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \
+ encode_sequence_maxsz + \
+ encode_putfh_maxsz + \
+ encode_layoutreturn_maxsz)
+#define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \
+ decode_sequence_maxsz + \
+ decode_putfh_maxsz + \
+ decode_layoutreturn_maxsz)
+#define NFS4_enc_secinfo_no_name_sz (compound_encode_hdr_maxsz + \
+ encode_sequence_maxsz + \
+ encode_putrootfh_maxsz +\
+ encode_secinfo_no_name_maxsz)
+#define NFS4_dec_secinfo_no_name_sz (compound_decode_hdr_maxsz + \
+ decode_sequence_maxsz + \
+ decode_putrootfh_maxsz + \
+ decode_secinfo_no_name_maxsz)
+#define NFS4_enc_test_stateid_sz (compound_encode_hdr_maxsz + \
+ encode_sequence_maxsz + \
+ encode_test_stateid_maxsz)
+#define NFS4_dec_test_stateid_sz (compound_decode_hdr_maxsz + \
+ decode_sequence_maxsz + \
+ decode_test_stateid_maxsz)
+#define NFS4_enc_free_stateid_sz (compound_encode_hdr_maxsz + \
+ encode_sequence_maxsz + \
+ encode_free_stateid_maxsz)
+#define NFS4_dec_free_stateid_sz (compound_decode_hdr_maxsz + \
+ decode_sequence_maxsz + \
+ decode_free_stateid_maxsz)
+
+const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
+ compound_encode_hdr_maxsz +
+ encode_sequence_maxsz +
+ encode_putfh_maxsz +
+ encode_getattr_maxsz) *
+ XDR_UNIT);
+
+const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
+ compound_decode_hdr_maxsz +
+ decode_sequence_maxsz +
+ decode_putfh_maxsz) *
+ XDR_UNIT);
+
+const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH +
+ compound_decode_hdr_maxsz +
+ decode_sequence_maxsz) *
+ XDR_UNIT);
+EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead);
+#endif /* CONFIG_NFS_V4_1 */
+
+static const umode_t nfs_type2fmt[] = {
+ [NF4BAD] = 0,
+ [NF4REG] = S_IFREG,
+ [NF4DIR] = S_IFDIR,
+ [NF4BLK] = S_IFBLK,
+ [NF4CHR] = S_IFCHR,
+ [NF4LNK] = S_IFLNK,
+ [NF4SOCK] = S_IFSOCK,
+ [NF4FIFO] = S_IFIFO,
+ [NF4ATTRDIR] = 0,
+ [NF4NAMEDATTR] = 0,
+};
+
+struct compound_hdr {
+ int32_t status;
+ uint32_t nops;
+ __be32 * nops_p;
+ uint32_t taglen;
+ char * tag;
+ uint32_t replen; /* expected reply words */
+ u32 minorversion;
+};
+
+static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
+{
+ __be32 *p = xdr_reserve_space(xdr, nbytes);
+ BUG_ON(!p);
+ return p;
+}
+
+static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
+{
+ __be32 *p;
+
+ p = xdr_reserve_space(xdr, len);
+ xdr_encode_opaque_fixed(p, buf, len);
+}
+
+static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
+{
+ __be32 *p;
+
+ p = reserve_space(xdr, 4 + len);
+ xdr_encode_opaque(p, str, len);
+}
+
+static void encode_uint32(struct xdr_stream *xdr, u32 n)
+{
+ __be32 *p;
+
+ p = reserve_space(xdr, 4);
+ *p = cpu_to_be32(n);
+}
+
+static void encode_uint64(struct xdr_stream *xdr, u64 n)
+{
+ __be32 *p;
+
+ p = reserve_space(xdr, 8);
+ xdr_encode_hyper(p, n);
+}
+
+static void encode_nfs4_seqid(struct xdr_stream *xdr,
+ const struct nfs_seqid *seqid)
+{
+ if (seqid != NULL)
+ encode_uint32(xdr, seqid->sequence->counter);
+ else
+ encode_uint32(xdr, 0);
+}
+
+static void encode_compound_hdr(struct xdr_stream *xdr,
+ struct rpc_rqst *req,
+ struct compound_hdr *hdr)
+{
+ __be32 *p;
+ struct rpc_auth *auth = req->rq_cred->cr_auth;
+
+ /* initialize running count of expected bytes in reply.
+ * NOTE: the replied tag SHOULD be the same is the one sent,
+ * but this is not required as a MUST for the server to do so. */
+ hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
+
+ WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
+ encode_string(xdr, hdr->taglen, hdr->tag);
+ p = reserve_space(xdr, 8);
+ *p++ = cpu_to_be32(hdr->minorversion);
+ hdr->nops_p = p;
+ *p = cpu_to_be32(hdr->nops);
+}
+
+static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
+ uint32_t replen,
+ struct compound_hdr *hdr)
+{
+ encode_uint32(xdr, op);
+ hdr->nops++;
+ hdr->replen += replen;
+}
+
+static void encode_nops(struct compound_hdr *hdr)
+{
+ WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
+ *hdr->nops_p = htonl(hdr->nops);
+}
+
+static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid)
+{
+ encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
+}
+
+static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
+{
+ encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
+}
+
+static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
+ const struct nfs4_label *label,
+ const struct nfs_server *server,
+ bool excl_check)
+{
+ char owner_name[IDMAP_NAMESZ];
+ char owner_group[IDMAP_NAMESZ];
+ int owner_namelen = 0;
+ int owner_grouplen = 0;
+ __be32 *p;
+ unsigned i;
+ uint32_t len = 0;
+ uint32_t bmval_len;
+ uint32_t bmval[3] = { 0 };
+
+ /*
+ * We reserve enough space to write the entire attribute buffer at once.
+ * In the worst-case, this would be
+ * 16(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
+ * = 40 bytes, plus any contribution from variable-length fields
+ * such as owner/group.
+ */
+ if (iap->ia_valid & ATTR_SIZE) {
+ bmval[0] |= FATTR4_WORD0_SIZE;
+ len += 8;
+ }
+ if (iap->ia_valid & ATTR_MODE) {
+ bmval[1] |= FATTR4_WORD1_MODE;
+ len += 4;
+ }
+ if (iap->ia_valid & ATTR_UID) {
+ owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
+ if (owner_namelen < 0) {
+ dprintk("nfs: couldn't resolve uid %d to string\n",
+ from_kuid(&init_user_ns, iap->ia_uid));
+ /* XXX */
+ strcpy(owner_name, "nobody");
+ owner_namelen = sizeof("nobody") - 1;
+ /* goto out; */
+ }
+ bmval[1] |= FATTR4_WORD1_OWNER;
+ len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
+ }
+ if (iap->ia_valid & ATTR_GID) {
+ owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
+ if (owner_grouplen < 0) {
+ dprintk("nfs: couldn't resolve gid %d to string\n",
+ from_kgid(&init_user_ns, iap->ia_gid));
+ strcpy(owner_group, "nobody");
+ owner_grouplen = sizeof("nobody") - 1;
+ /* goto out; */
+ }
+ bmval[1] |= FATTR4_WORD1_OWNER_GROUP;
+ len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
+ }
+ if (iap->ia_valid & ATTR_ATIME_SET) {
+ bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
+ len += 16;
+ } else if (iap->ia_valid & ATTR_ATIME) {
+ bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET;
+ len += 4;
+ }
+ if (iap->ia_valid & ATTR_MTIME_SET) {
+ bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
+ len += 16;
+ } else if (iap->ia_valid & ATTR_MTIME) {
+ bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET;
+ len += 4;
+ }
+
+ if (excl_check) {
+ const u32 *excl_bmval = server->exclcreat_bitmask;
+ bmval[0] &= excl_bmval[0];
+ bmval[1] &= excl_bmval[1];
+ bmval[2] &= excl_bmval[2];
+
+ if (!(excl_bmval[2] & FATTR4_WORD2_SECURITY_LABEL))
+ label = NULL;
+ }
+
+ if (label) {
+ len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
+ bmval[2] |= FATTR4_WORD2_SECURITY_LABEL;
+ }
+
+ if (bmval[2] != 0)
+ bmval_len = 3;
+ else if (bmval[1] != 0)
+ bmval_len = 2;
+ else
+ bmval_len = 1;
+
+ p = reserve_space(xdr, 4 + (bmval_len << 2) + 4 + len);
+
+ *p++ = cpu_to_be32(bmval_len);
+ for (i = 0; i < bmval_len; i++)
+ *p++ = cpu_to_be32(bmval[i]);
+ *p++ = cpu_to_be32(len);
+
+ if (bmval[0] & FATTR4_WORD0_SIZE)
+ p = xdr_encode_hyper(p, iap->ia_size);
+ if (bmval[1] & FATTR4_WORD1_MODE)
+ *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
+ if (bmval[1] & FATTR4_WORD1_OWNER)
+ p = xdr_encode_opaque(p, owner_name, owner_namelen);
+ if (bmval[1] & FATTR4_WORD1_OWNER_GROUP)
+ p = xdr_encode_opaque(p, owner_group, owner_grouplen);
+ if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
+ if (iap->ia_valid & ATTR_ATIME_SET) {
+ *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
+ p = xdr_encode_hyper(p, (s64)iap->ia_atime.tv_sec);
+ *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
+ } else
+ *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
+ }
+ if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
+ if (iap->ia_valid & ATTR_MTIME_SET) {
+ *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
+ p = xdr_encode_hyper(p, (s64)iap->ia_mtime.tv_sec);
+ *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
+ } else
+ *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
+ }
+ if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
+ *p++ = cpu_to_be32(label->lfs);
+ *p++ = cpu_to_be32(label->pi);
+ *p++ = cpu_to_be32(label->len);
+ p = xdr_encode_opaque_fixed(p, label->label, label->len);
+ }
+
+/* out: */
+}
+
+static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
+{
+ encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr);
+ encode_uint32(xdr, access);
+}
+
+static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
+{
+ encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr);
+ encode_nfs4_seqid(xdr, arg->seqid);
+ encode_nfs4_stateid(xdr, &arg->stateid);
+}
+
+static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr)
+{
+ __be32 *p;
+
+ encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr);
+ p = reserve_space(xdr, 12);
+ p = xdr_encode_hyper(p, args->offset);
+ *p = cpu_to_be32(args->count);
+}
+
+static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
+{
+ __be32 *p;
+
+ encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr);
+ encode_uint32(xdr, create->ftype);
+
+ switch (create->ftype) {
+ case NF4LNK:
+ p = reserve_space(xdr, 4);
+ *p = cpu_to_be32(create->u.symlink.len);
+ xdr_write_pages(xdr, create->u.symlink.pages, 0,
+ create->u.symlink.len);
+ xdr->buf->flags |= XDRBUF_WRITE;
+ break;
+
+ case NF4BLK: case NF4CHR:
+ p = reserve_space(xdr, 8);
+ *p++ = cpu_to_be32(create->u.device.specdata1);
+ *p = cpu_to_be32(create->u.device.specdata2);
+ break;
+
+ default:
+ break;
+ }
+
+ encode_string(xdr, create->name->len, create->name->name);
+ encode_attrs(xdr, create->attrs, create->label, create->server, false);
+}
+
+static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
+{
+ __be32 *p;
+
+ encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
+ p = reserve_space(xdr, 8);
+ *p++ = cpu_to_be32(1);
+ *p = cpu_to_be32(bitmap);
+}
+
+static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
+{
+ __be32 *p;
+
+ encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
+ p = reserve_space(xdr, 12);
+ *p++ = cpu_to_be32(2);
+ *p++ = cpu_to_be32(bm0);
+ *p = cpu_to_be32(bm1);
+}
+
+static void
+encode_getattr_three(struct xdr_stream *xdr,
+ uint32_t bm0, uint32_t bm1, uint32_t bm2,
+ struct compound_hdr *hdr)
+{
+ __be32 *p;
+
+ encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr);
+ if (bm2) {
+ p = reserve_space(xdr, 16);
+ *p++ = cpu_to_be32(3);
+ *p++ = cpu_to_be32(bm0);
+ *p++ = cpu_to_be32(bm1);
+ *p = cpu_to_be32(bm2);
+ } else if (bm1) {
+ p = reserve_space(xdr, 12);
+ *p++ = cpu_to_be32(2);
+ *p++ = cpu_to_be32(bm0);
+ *p = cpu_to_be32(bm1);
+ } else {
+ p = reserve_space(xdr, 8);
+ *p++ = cpu_to_be32(1);
+ *p = cpu_to_be32(bm0);
+ }
+}
+
+static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
+{
+ encode_getattr_three(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
+ bitmask[1] & nfs4_fattr_bitmap[1],
+ bitmask[2] & nfs4_fattr_bitmap[2],
+ hdr);
+}
+
+static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask,
+ const u32 *open_bitmap,
+ struct compound_hdr *hdr)
+{
+ encode_getattr_three(xdr,
+ bitmask[0] & open_bitmap[0],
+ bitmask[1] & open_bitmap[1],
+ bitmask[2] & open_bitmap[2],
+ hdr);
+}
+
+static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
+{
+ encode_getattr_three(xdr,
+ bitmask[0] & nfs4_fsinfo_bitmap[0],
+ bitmask[1] & nfs4_fsinfo_bitmap[1],
+ bitmask[2] & nfs4_fsinfo_bitmap[2],
+ hdr);
+}
+
+static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
+{
+ encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
+ bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
+}
+
+static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
+{
+ encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr);
+}
+
+static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
+{
+ encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr);
+ encode_string(xdr, name->len, name->name);
+}
+
+static inline int nfs4_lock_type(struct file_lock *fl, int block)
+{
+ if (fl->fl_type == F_RDLCK)
+ return block ? NFS4_READW_LT : NFS4_READ_LT;
+ return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
+}
+
+static inline uint64_t nfs4_lock_length(struct file_lock *fl)
+{
+ if (fl->fl_end == OFFSET_MAX)
+ return ~(uint64_t)0;
+ return fl->fl_end - fl->fl_start + 1;
+}
+
+static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
+{
+ __be32 *p;
+
+ p = reserve_space(xdr, 32);
+ p = xdr_encode_hyper(p, lowner->clientid);
+ *p++ = cpu_to_be32(20);
+ p = xdr_encode_opaque_fixed(p, "lock id:", 8);
+ *p++ = cpu_to_be32(lowner->s_dev);
+ xdr_encode_hyper(p, lowner->id);
+}
+
+/*
+ * opcode,type,reclaim,offset,length,new_lock_owner = 32
+ * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
+ */
+static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
+{
+ __be32 *p;
+
+ encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
+ p = reserve_space(xdr, 28);
+ *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
+ *p++ = cpu_to_be32(args->reclaim);
+ p = xdr_encode_hyper(p, args->fl->fl_start);
+ p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
+ *p = cpu_to_be32(args->new_lock_owner);
+ if (args->new_lock_owner){
+ encode_nfs4_seqid(xdr, args->open_seqid);
+ encode_nfs4_stateid(xdr, &args->open_stateid);
+ encode_nfs4_seqid(xdr, args->lock_seqid);
+ encode_lockowner(xdr, &args->lock_owner);
+ }
+ else {
+ encode_nfs4_stateid(xdr, &args->lock_stateid);
+ encode_nfs4_seqid(xdr, args->lock_seqid);
+ }
+}
+
+static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
+{
+ __be32 *p;
+
+ encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr);
+ p = reserve_space(xdr, 20);
+ *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
+ p = xdr_encode_hyper(p, args->fl->fl_start);
+ p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
+ encode_lockowner(xdr, &args->lock_owner);
+}
+
+static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
+{
+ __be32 *p;
+
+ encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr);
+ encode_uint32(xdr, nfs4_lock_type(args->fl, 0));
+ encode_nfs4_seqid(xdr, args->seqid);
+ encode_nfs4_stateid(xdr, &args->stateid);
+ p = reserve_space(xdr, 16);
+ p = xdr_encode_hyper(p, args->fl->fl_start);
+ xdr_encode_hyper(p, nfs4_lock_length(args->fl));
+}
+
+static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
+{
+ encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr);
+ encode_lockowner(xdr, lowner);
+}
+
+static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
+{
+ encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr);
+ encode_string(xdr, name->len, name->name);
+}
+
+static void encode_share_access(struct xdr_stream *xdr, u32 share_access)
+{
+ __be32 *p;
+
+ p = reserve_space(xdr, 8);
+ *p++ = cpu_to_be32(share_access);
+ *p = cpu_to_be32(0); /* for linux, share_deny = 0 always */
+}
+
+static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
+{
+ __be32 *p;
+ /*
+ * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
+ * owner 4 = 32
+ */
+ encode_nfs4_seqid(xdr, arg->seqid);
+ encode_share_access(xdr, arg->share_access);
+ p = reserve_space(xdr, 36);
+ p = xdr_encode_hyper(p, arg->clientid);
+ *p++ = cpu_to_be32(24);
+ p = xdr_encode_opaque_fixed(p, "open id:", 8);
+ *p++ = cpu_to_be32(arg->server->s_dev);
+ *p++ = cpu_to_be32(arg->id.uniquifier);
+ xdr_encode_hyper(p, arg->id.create_time);
+}
+
+static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
+{
+ __be32 *p;
+
+ p = reserve_space(xdr, 4);
+ switch(arg->createmode) {
+ case NFS4_CREATE_UNCHECKED:
+ *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
+ encode_attrs(xdr, arg->u.attrs, arg->label, arg->server, false);
+ break;
+ case NFS4_CREATE_GUARDED:
+ *p = cpu_to_be32(NFS4_CREATE_GUARDED);
+ encode_attrs(xdr, arg->u.attrs, arg->label, arg->server, false);
+ break;
+ case NFS4_CREATE_EXCLUSIVE:
+ *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
+ encode_nfs4_verifier(xdr, &arg->u.verifier);
+ break;
+ case NFS4_CREATE_EXCLUSIVE4_1:
+ *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
+ encode_nfs4_verifier(xdr, &arg->u.verifier);
+ encode_attrs(xdr, arg->u.attrs, arg->label, arg->server, true);
+ }
+}
+
+static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
+{
+ __be32 *p;
+
+ p = reserve_space(xdr, 4);
+ switch (arg->open_flags & O_CREAT) {
+ case 0:
+ *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
+ break;
+ default:
+ *p = cpu_to_be32(NFS4_OPEN_CREATE);
+ encode_createmode(xdr, arg);
+ }
+}
+
+static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
+{
+ __be32 *p;
+
+ p = reserve_space(xdr, 4);
+ switch (delegation_type) {
+ case 0:
+ *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
+ break;
+ case FMODE_READ:
+ *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
+ break;
+ case FMODE_WRITE|FMODE_READ:
+ *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
+ break;
+ default:
+ BUG();
+ }
+}
+
+static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
+{
+ __be32 *p;
+
+ p = reserve_space(xdr, 4);
+ *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
+ encode_string(xdr, name->len, name->name);
+}
+
+static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
+{
+ __be32 *p;
+
+ p = reserve_space(xdr, 4);
+ *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
+ encode_delegation_type(xdr, type);
+}
+
+static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
+{
+ __be32 *p;
+
+ p = reserve_space(xdr, 4);
+ *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
+ encode_nfs4_stateid(xdr, stateid);
+ encode_string(xdr, name->len, name->name);
+}
+
+static inline void encode_claim_fh(struct xdr_stream *xdr)
+{
+ __be32 *p;
+
+ p = reserve_space(xdr, 4);
+ *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH);
+}
+
+static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid)
+{
+ __be32 *p;
+
+ p = reserve_space(xdr, 4);
+ *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH);
+ encode_nfs4_stateid(xdr, stateid);
+}
+
+static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
+{
+ encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr);
+ encode_openhdr(xdr, arg);
+ encode_opentype(xdr, arg);
+ switch (arg->claim) {
+ case NFS4_OPEN_CLAIM_NULL:
+ encode_claim_null(xdr, arg->name);
+ break;
+ case NFS4_OPEN_CLAIM_PREVIOUS:
+ encode_claim_previous(xdr, arg->u.delegation_type);
+ break;
+ case NFS4_OPEN_CLAIM_DELEGATE_CUR:
+ encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
+ break;
+ case NFS4_OPEN_CLAIM_FH:
+ encode_claim_fh(xdr);
+ break;
+ case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
+ encode_claim_delegate_cur_fh(xdr, &arg->u.delegation);
+ break;
+ default:
+ BUG();
+ }
+}
+
+static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
+{
+ encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr);
+ encode_nfs4_stateid(xdr, arg->stateid);
+ encode_nfs4_seqid(xdr, arg->seqid);
+}
+
+static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
+{
+ encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr);
+ encode_nfs4_stateid(xdr, &arg->stateid);
+ encode_nfs4_seqid(xdr, arg->seqid);
+ encode_share_access(xdr, arg->share_access);
+}
+
+static void
+encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
+{
+ encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr);
+ encode_string(xdr, fh->size, fh->data);
+}
+
+static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
+{
+ encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
+}
+
+static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
+ struct compound_hdr *hdr)
+{
+ __be32 *p;
+
+ encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
+ encode_nfs4_stateid(xdr, &args->stateid);
+
+ p = reserve_space(xdr, 12);
+ p = xdr_encode_hyper(p, args->offset);
+ *p = cpu_to_be32(args->count);
+}
+
+static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
+{
+ uint32_t attrs[3] = {
+ FATTR4_WORD0_RDATTR_ERROR,
+ FATTR4_WORD1_MOUNTED_ON_FILEID,
+ };
+ uint32_t dircount = readdir->count >> 1;
+ __be32 *p, verf[2];
+ uint32_t attrlen = 0;
+ unsigned int i;
+
+ if (readdir->plus) {
+ attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
+ FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID;
+ attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
+ FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
+ FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
+ FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
+ attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
+ dircount >>= 1;
+ }
+ /* Use mounted_on_fileid only if the server supports it */
+ if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID))
+ attrs[0] |= FATTR4_WORD0_FILEID;
+ for (i = 0; i < ARRAY_SIZE(attrs); i++) {
+ attrs[i] &= readdir->bitmask[i];
+ if (attrs[i] != 0)
+ attrlen = i+1;
+ }
+
+ encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
+ encode_uint64(xdr, readdir->cookie);
+ encode_nfs4_verifier(xdr, &readdir->verifier);
+ p = reserve_space(xdr, 12 + (attrlen << 2));
+ *p++ = cpu_to_be32(dircount);
+ *p++ = cpu_to_be32(readdir->count);
+ *p++ = cpu_to_be32(attrlen);
+ for (i = 0; i < attrlen; i++)
+ *p++ = cpu_to_be32(attrs[i]);
+ memcpy(verf, readdir->verifier.data, sizeof(verf));
+
+ dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
+ __func__,
+ (unsigned long long)readdir->cookie,
+ verf[0], verf[1],
+ attrs[0] & readdir->bitmask[0],
+ attrs[1] & readdir->bitmask[1],
+ attrs[2] & readdir->bitmask[2]);
+}
+
+static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
+{
+ encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr);
+}
+
+static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
+{
+ encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr);
+ encode_string(xdr, name->len, name->name);
+}
+
+static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
+{
+ encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr);
+ encode_string(xdr, oldname->len, oldname->name);
+ encode_string(xdr, newname->len, newname->name);
+}
+
+static void encode_renew(struct xdr_stream *xdr, clientid4 clid,
+ struct compound_hdr *hdr)
+{
+ encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
+ encode_uint64(xdr, clid);
+}
+
+static void
+encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
+{
+ encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr);
+}
+
+static void
+encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
+{
+ __be32 *p;
+
+ encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr);
+ encode_nfs4_stateid(xdr, &zero_stateid);
+ p = reserve_space(xdr, 2*4);
+ *p++ = cpu_to_be32(1);
+ *p = cpu_to_be32(FATTR4_WORD0_ACL);
+ p = reserve_space(xdr, 4);
+ *p = cpu_to_be32(arg->acl_len);
+ xdr_write_pages(xdr, arg->acl_pages, 0, arg->acl_len);
+}
+
+static void
+encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
+{
+ encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr);
+}
+
+static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
+{
+ encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
+ encode_nfs4_stateid(xdr, &arg->stateid);
+ encode_attrs(xdr, arg->iap, arg->label, server, false);
+}
+
+static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
+{
+ __be32 *p;
+
+ encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr);
+ encode_nfs4_verifier(xdr, setclientid->sc_verifier);
+
+ encode_string(xdr, strlen(setclientid->sc_clnt->cl_owner_id),
+ setclientid->sc_clnt->cl_owner_id);
+ p = reserve_space(xdr, 4);
+ *p = cpu_to_be32(setclientid->sc_prog);
+ encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
+ encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
+ p = reserve_space(xdr, 4);
+ *p = cpu_to_be32(setclientid->sc_clnt->cl_cb_ident);
+}
+
+static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
+{
+ encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM,
+ decode_setclientid_confirm_maxsz, hdr);
+ encode_uint64(xdr, arg->clientid);
+ encode_nfs4_verifier(xdr, &arg->confirm);
+}
+
+static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args,
+ struct compound_hdr *hdr)
+{
+ __be32 *p;
+
+ encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
+ encode_nfs4_stateid(xdr, &args->stateid);
+
+ p = reserve_space(xdr, 16);
+ p = xdr_encode_hyper(p, args->offset);
+ *p++ = cpu_to_be32(args->stable);
+ *p = cpu_to_be32(args->count);
+
+ xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
+}
+
+static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
+{
+ encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr);
+ encode_nfs4_stateid(xdr, stateid);
+}
+
+static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
+{
+ encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr);
+ encode_string(xdr, name->len, name->name);
+}
+
+#if defined(CONFIG_NFS_V4_1)
+/* NFSv4.1 operations */
+static void encode_bind_conn_to_session(struct xdr_stream *xdr,
+ struct nfs41_bind_conn_to_session_args *args,
+ struct compound_hdr *hdr)
+{
+ __be32 *p;
+
+ encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,
+ decode_bind_conn_to_session_maxsz, hdr);
+ encode_opaque_fixed(xdr, args->sessionid.data, NFS4_MAX_SESSIONID_LEN);
+ p = xdr_reserve_space(xdr, 8);
+ *p++ = cpu_to_be32(args->dir);
+ *p = (args->use_conn_in_rdma_mode) ? cpu_to_be32(1) : cpu_to_be32(0);
+}
+
+static void encode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
+{
+ unsigned int i;
+ encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS);
+ for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++)
+ encode_uint32(xdr, op_map->u.words[i]);
+}
+
+static void encode_exchange_id(struct xdr_stream *xdr,
+ struct nfs41_exchange_id_args *args,
+ struct compound_hdr *hdr)
+{
+ __be32 *p;
+ char impl_name[IMPL_NAME_LIMIT];
+ int len = 0;
+
+ encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
+ encode_nfs4_verifier(xdr, args->verifier);
+
+ encode_string(xdr, strlen(args->client->cl_owner_id),
+ args->client->cl_owner_id);
+
+ encode_uint32(xdr, args->flags);
+ encode_uint32(xdr, args->state_protect.how);
+
+ switch (args->state_protect.how) {
+ case SP4_NONE:
+ break;
+ case SP4_MACH_CRED:
+ encode_op_map(xdr, &args->state_protect.enforce);
+ encode_op_map(xdr, &args->state_protect.allow);
+ break;
+ default:
+ WARN_ON_ONCE(1);
+ break;
+ }
+
+ if (send_implementation_id &&
+ sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
+ sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
+ <= sizeof(impl_name) + 1)
+ len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
+ utsname()->sysname, utsname()->release,
+ utsname()->version, utsname()->machine);
+
+ if (len > 0) {
+ encode_uint32(xdr, 1); /* implementation id array length=1 */
+
+ encode_string(xdr,
+ sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1,
+ CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN);
+ encode_string(xdr, len, impl_name);
+ /* just send zeros for nii_date - the date is in nii_name */
+ p = reserve_space(xdr, 12);
+ p = xdr_encode_hyper(p, 0);
+ *p = cpu_to_be32(0);
+ } else
+ encode_uint32(xdr, 0); /* implementation id array length=0 */
+}
+
+static void encode_create_session(struct xdr_stream *xdr,
+ struct nfs41_create_session_args *args,
+ struct compound_hdr *hdr)
+{
+ __be32 *p;
+ struct nfs_client *clp = args->client;
+ struct rpc_clnt *clnt = clp->cl_rpcclient;
+ struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
+ u32 max_resp_sz_cached;
+
+ /*
+ * Assumes OPEN is the biggest non-idempotent compound.
+ * 2 is the verifier.
+ */
+ max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
+ RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
+
+ encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr);
+ p = reserve_space(xdr, 16 + 2*28 + 20 + clnt->cl_nodelen + 12);
+ p = xdr_encode_hyper(p, args->clientid);
+ *p++ = cpu_to_be32(args->seqid); /*Sequence id */
+ *p++ = cpu_to_be32(args->flags); /*flags */
+
+ /* Fore Channel */
+ *p++ = cpu_to_be32(0); /* header padding size */
+ *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
+ *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
+ *p++ = cpu_to_be32(max_resp_sz_cached); /* Max resp sz cached */
+ *p++ = cpu_to_be32(args->fc_attrs.max_ops); /* max operations */
+ *p++ = cpu_to_be32(args->fc_attrs.max_reqs); /* max requests */
+ *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
+
+ /* Back Channel */
+ *p++ = cpu_to_be32(0); /* header padding size */
+ *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
+ *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
+ *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached); /* Max resp sz cached */
+ *p++ = cpu_to_be32(args->bc_attrs.max_ops); /* max operations */
+ *p++ = cpu_to_be32(args->bc_attrs.max_reqs); /* max requests */
+ *p++ = cpu_to_be32(0); /* rdmachannel_attrs */
+
+ *p++ = cpu_to_be32(args->cb_program); /* cb_program */
+ *p++ = cpu_to_be32(1);
+ *p++ = cpu_to_be32(RPC_AUTH_UNIX); /* auth_sys */
+
+ /* authsys_parms rfc1831 */
+ *p++ = cpu_to_be32(nn->boot_time.tv_nsec); /* stamp */
+ p = xdr_encode_array(p, clnt->cl_nodename, clnt->cl_nodelen);
+ *p++ = cpu_to_be32(0); /* UID */
+ *p++ = cpu_to_be32(0); /* GID */
+ *p = cpu_to_be32(0); /* No more gids */
+}
+
+static void encode_destroy_session(struct xdr_stream *xdr,
+ struct nfs4_session *session,
+ struct compound_hdr *hdr)
+{
+ encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr);
+ encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
+}
+
+static void encode_destroy_clientid(struct xdr_stream *xdr,
+ uint64_t clientid,
+ struct compound_hdr *hdr)
+{
+ encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr);
+ encode_uint64(xdr, clientid);
+}
+
+static void encode_reclaim_complete(struct xdr_stream *xdr,
+ struct nfs41_reclaim_complete_args *args,
+ struct compound_hdr *hdr)
+{
+ encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr);
+ encode_uint32(xdr, args->one_fs);
+}
+#endif /* CONFIG_NFS_V4_1 */
+
+static void encode_sequence(struct xdr_stream *xdr,
+ const struct nfs4_sequence_args *args,
+ struct compound_hdr *hdr)
+{
+#if defined(CONFIG_NFS_V4_1)
+ struct nfs4_session *session;
+ struct nfs4_slot_table *tp;
+ struct nfs4_slot *slot = args->sa_slot;
+ __be32 *p;
+
+ tp = slot->table;
+ session = tp->session;
+ if (!session)
+ return;
+
+ encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
+
+ /*
+ * Sessionid + seqid + slotid + max slotid + cache_this
+ */
+ dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
+ "max_slotid=%d cache_this=%d\n",
+ __func__,
+ ((u32 *)session->sess_id.data)[0],
+ ((u32 *)session->sess_id.data)[1],
+ ((u32 *)session->sess_id.data)[2],
+ ((u32 *)session->sess_id.data)[3],
+ slot->seq_nr, slot->slot_nr,
+ tp->highest_used_slotid, args->sa_cache_this);
+ p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
+ p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
+ *p++ = cpu_to_be32(slot->seq_nr);
+ *p++ = cpu_to_be32(slot->slot_nr);
+ *p++ = cpu_to_be32(tp->highest_used_slotid);
+ *p = cpu_to_be32(args->sa_cache_this);
+#endif /* CONFIG_NFS_V4_1 */
+}
+
+#ifdef CONFIG_NFS_V4_1
+static void
+encode_getdeviceinfo(struct xdr_stream *xdr,
+ const struct nfs4_getdeviceinfo_args *args,
+ struct compound_hdr *hdr)
+{
+ __be32 *p;
+
+ encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr);
+ p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 4 + 4);
+ p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
+ NFS4_DEVICEID4_SIZE);
+ *p++ = cpu_to_be32(args->pdev->layout_type);
+ *p++ = cpu_to_be32(args->pdev->maxcount); /* gdia_maxcount */
+
+ p = reserve_space(xdr, 4 + 4);
+ *p++ = cpu_to_be32(1); /* bitmap length */
+ *p++ = cpu_to_be32(args->notify_types);
+}
+
+static void
+encode_layoutget(struct xdr_stream *xdr,
+ const struct nfs4_layoutget_args *args,
+ struct compound_hdr *hdr)
+{
+ __be32 *p;
+
+ encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr);
+ p = reserve_space(xdr, 36);
+ *p++ = cpu_to_be32(0); /* Signal layout available */
+ *p++ = cpu_to_be32(args->type);
+ *p++ = cpu_to_be32(args->range.iomode);
+ p = xdr_encode_hyper(p, args->range.offset);
+ p = xdr_encode_hyper(p, args->range.length);
+ p = xdr_encode_hyper(p, args->minlength);
+ encode_nfs4_stateid(xdr, &args->stateid);
+ encode_uint32(xdr, args->maxcount);
+
+ dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
+ __func__,
+ args->type,
+ args->range.iomode,
+ (unsigned long)args->range.offset,
+ (unsigned long)args->range.length,
+ args->maxcount);
+}
+
+static int
+encode_layoutcommit(struct xdr_stream *xdr,
+ struct inode *inode,
+ struct nfs4_layoutcommit_args *args,
+ struct compound_hdr *hdr)
+{
+ __be32 *p;
+
+ dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
+ NFS_SERVER(args->inode)->pnfs_curr_ld->id);
+
+ encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr);
+ p = reserve_space(xdr, 20);
+ /* Only whole file layouts */
+ p = xdr_encode_hyper(p, 0); /* offset */
+ p = xdr_encode_hyper(p, args->lastbytewritten + 1); /* length */
+ *p = cpu_to_be32(0); /* reclaim */
+ encode_nfs4_stateid(xdr, &args->stateid);
+ p = reserve_space(xdr, 20);
+ *p++ = cpu_to_be32(1); /* newoffset = TRUE */
+ p = xdr_encode_hyper(p, args->lastbytewritten);
+ *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
+ *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
+
+ if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit) {
+ NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
+ NFS_I(inode)->layout, xdr, args);
+ } else {
+ encode_uint32(xdr, args->layoutupdate_len);
+ if (args->layoutupdate_pages) {
+ xdr_write_pages(xdr, args->layoutupdate_pages, 0,
+ args->layoutupdate_len);
+ }
+ }
+
+ return 0;
+}
+
+static void
+encode_layoutreturn(struct xdr_stream *xdr,
+ const struct nfs4_layoutreturn_args *args,
+ struct compound_hdr *hdr)
+{
+ __be32 *p;
+
+ encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr);
+ p = reserve_space(xdr, 16);
+ *p++ = cpu_to_be32(0); /* reclaim. always 0 for now */
+ *p++ = cpu_to_be32(args->layout_type);
+ *p++ = cpu_to_be32(args->range.iomode);
+ *p = cpu_to_be32(RETURN_FILE);
+ p = reserve_space(xdr, 16);
+ p = xdr_encode_hyper(p, args->range.offset);
+ p = xdr_encode_hyper(p, args->range.length);
+ spin_lock(&args->inode->i_lock);
+ encode_nfs4_stateid(xdr, &args->stateid);
+ spin_unlock(&args->inode->i_lock);
+ if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
+ NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
+ NFS_I(args->inode)->layout, xdr, args);
+ } else
+ encode_uint32(xdr, 0);
+}
+
+static int
+encode_secinfo_no_name(struct xdr_stream *xdr,
+ const struct nfs41_secinfo_no_name_args *args,
+ struct compound_hdr *hdr)
+{
+ encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr);
+ encode_uint32(xdr, args->style);
+ return 0;
+}
+
+static void encode_test_stateid(struct xdr_stream *xdr,
+ struct nfs41_test_stateid_args *args,
+ struct compound_hdr *hdr)
+{
+ encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr);
+ encode_uint32(xdr, 1);
+ encode_nfs4_stateid(xdr, args->stateid);
+}
+
+static void encode_free_stateid(struct xdr_stream *xdr,
+ struct nfs41_free_stateid_args *args,
+ struct compound_hdr *hdr)
+{
+ encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
+ encode_nfs4_stateid(xdr, &args->stateid);
+}
+#endif /* CONFIG_NFS_V4_1 */
+
+/*
+ * END OF "GENERIC" ENCODE ROUTINES.
+ */
+
+static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
+{
+#if defined(CONFIG_NFS_V4_1)
+ struct nfs4_session *session = args->sa_slot->table->session;
+ if (session)
+ return session->clp->cl_mvops->minor_version;
+#endif /* CONFIG_NFS_V4_1 */
+ return 0;
+}
+
+/*
+ * Encode an ACCESS request
+ */
+static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
+ const struct nfs4_accessargs *args)
+{
+ struct compound_hdr hdr = {
+ .minorversion = nfs4_xdr_minorversion(&args->seq_args),
+ };
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_sequence(xdr, &args->seq_args, &hdr);
+ encode_putfh(xdr, args->fh, &hdr);
+ encode_access(xdr, args->access, &hdr);
+ encode_getfattr(xdr, args->bitmask, &hdr);
+ encode_nops(&hdr);
+}
+
+/*
+ * Encode LOOKUP request
+ */
+static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
+ const struct nfs4_lookup_arg *args)
+{
+ struct compound_hdr hdr = {
+ .minorversion = nfs4_xdr_minorversion(&args->seq_args),
+ };
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_sequence(xdr, &args->seq_args, &hdr);
+ encode_putfh(xdr, args->dir_fh, &hdr);
+ encode_lookup(xdr, args->name, &hdr);
+ encode_getfh(xdr, &hdr);
+ encode_getfattr(xdr, args->bitmask, &hdr);
+ encode_nops(&hdr);
+}
+
+/*
+ * Encode LOOKUP_ROOT request
+ */
+static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
+ struct xdr_stream *xdr,
+ const struct nfs4_lookup_root_arg *args)
+{
+ struct compound_hdr hdr = {
+ .minorversion = nfs4_xdr_minorversion(&args->seq_args),
+ };
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_sequence(xdr, &args->seq_args, &hdr);
+ encode_putrootfh(xdr, &hdr);
+ encode_getfh(xdr, &hdr);
+ encode_getfattr(xdr, args->bitmask, &hdr);
+ encode_nops(&hdr);
+}
+
+/*
+ * Encode REMOVE request
+ */
+static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
+ const struct nfs_removeargs *args)
+{
+ struct compound_hdr hdr = {
+ .minorversion = nfs4_xdr_minorversion(&args->seq_args),
+ };
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_sequence(xdr, &args->seq_args, &hdr);
+ encode_putfh(xdr, args->fh, &hdr);
+ encode_remove(xdr, &args->name, &hdr);
+ encode_nops(&hdr);
+}
+
+/*
+ * Encode RENAME request
+ */
+static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
+ const struct nfs_renameargs *args)
+{
+ struct compound_hdr hdr = {
+ .minorversion = nfs4_xdr_minorversion(&args->seq_args),
+ };
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_sequence(xdr, &args->seq_args, &hdr);
+ encode_putfh(xdr, args->old_dir, &hdr);
+ encode_savefh(xdr, &hdr);
+ encode_putfh(xdr, args->new_dir, &hdr);
+ encode_rename(xdr, args->old_name, args->new_name, &hdr);
+ encode_nops(&hdr);
+}
+
+/*
+ * Encode LINK request
+ */
+static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
+ const struct nfs4_link_arg *args)
+{
+ struct compound_hdr hdr = {
+ .minorversion = nfs4_xdr_minorversion(&args->seq_args),
+ };
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_sequence(xdr, &args->seq_args, &hdr);
+ encode_putfh(xdr, args->fh, &hdr);
+ encode_savefh(xdr, &hdr);
+ encode_putfh(xdr, args->dir_fh, &hdr);
+ encode_link(xdr, args->name, &hdr);
+ encode_restorefh(xdr, &hdr);
+ encode_getfattr(xdr, args->bitmask, &hdr);
+ encode_nops(&hdr);
+}
+
+/*
+ * Encode CREATE request
+ */
+static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
+ const struct nfs4_create_arg *args)
+{
+ struct compound_hdr hdr = {
+ .minorversion = nfs4_xdr_minorversion(&args->seq_args),
+ };
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_sequence(xdr, &args->seq_args, &hdr);
+ encode_putfh(xdr, args->dir_fh, &hdr);
+ encode_create(xdr, args, &hdr);
+ encode_getfh(xdr, &hdr);
+ encode_getfattr(xdr, args->bitmask, &hdr);
+ encode_nops(&hdr);
+}
+
+/*
+ * Encode SYMLINK request
+ */
+static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
+ const struct nfs4_create_arg *args)
+{
+ nfs4_xdr_enc_create(req, xdr, args);
+}
+
+/*
+ * Encode GETATTR request
+ */
+static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
+ const struct nfs4_getattr_arg *args)
+{
+ struct compound_hdr hdr = {
+ .minorversion = nfs4_xdr_minorversion(&args->seq_args),
+ };
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_sequence(xdr, &args->seq_args, &hdr);
+ encode_putfh(xdr, args->fh, &hdr);
+ encode_getfattr(xdr, args->bitmask, &hdr);
+ encode_nops(&hdr);
+}
+
+/*
+ * Encode a CLOSE request
+ */
+static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
+ struct nfs_closeargs *args)
+{
+ struct compound_hdr hdr = {
+ .minorversion = nfs4_xdr_minorversion(&args->seq_args),
+ };
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_sequence(xdr, &args->seq_args, &hdr);
+ encode_putfh(xdr, args->fh, &hdr);
+ encode_close(xdr, args, &hdr);
+ encode_getfattr(xdr, args->bitmask, &hdr);
+ encode_nops(&hdr);
+}
+
+/*
+ * Encode an OPEN request
+ */
+static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
+ struct nfs_openargs *args)
+{
+ struct compound_hdr hdr = {
+ .minorversion = nfs4_xdr_minorversion(&args->seq_args),
+ };
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_sequence(xdr, &args->seq_args, &hdr);
+ encode_putfh(xdr, args->fh, &hdr);
+ encode_open(xdr, args, &hdr);
+ encode_getfh(xdr, &hdr);
+ if (args->access)
+ encode_access(xdr, args->access, &hdr);
+ encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
+ encode_nops(&hdr);
+}
+
+/*
+ * Encode an OPEN_CONFIRM request
+ */
+static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
+ struct xdr_stream *xdr,
+ struct nfs_open_confirmargs *args)
+{
+ struct compound_hdr hdr = {
+ .nops = 0,
+ };
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_putfh(xdr, args->fh, &hdr);
+ encode_open_confirm(xdr, args, &hdr);
+ encode_nops(&hdr);
+}
+
+/*
+ * Encode an OPEN request with no attributes.
+ */
+static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
+ struct xdr_stream *xdr,
+ struct nfs_openargs *args)
+{
+ struct compound_hdr hdr = {
+ .minorversion = nfs4_xdr_minorversion(&args->seq_args),
+ };
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_sequence(xdr, &args->seq_args, &hdr);
+ encode_putfh(xdr, args->fh, &hdr);
+ encode_open(xdr, args, &hdr);
+ if (args->access)
+ encode_access(xdr, args->access, &hdr);
+ encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
+ encode_nops(&hdr);
+}
+
+/*
+ * Encode an OPEN_DOWNGRADE request
+ */
+static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
+ struct xdr_stream *xdr,
+ struct nfs_closeargs *args)
+{
+ struct compound_hdr hdr = {
+ .minorversion = nfs4_xdr_minorversion(&args->seq_args),
+ };
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_sequence(xdr, &args->seq_args, &hdr);
+ encode_putfh(xdr, args->fh, &hdr);
+ encode_open_downgrade(xdr, args, &hdr);
+ encode_getfattr(xdr, args->bitmask, &hdr);
+ encode_nops(&hdr);
+}
+
+/*
+ * Encode a LOCK request
+ */
+static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
+ struct nfs_lock_args *args)
+{
+ struct compound_hdr hdr = {
+ .minorversion = nfs4_xdr_minorversion(&args->seq_args),
+ };
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_sequence(xdr, &args->seq_args, &hdr);
+ encode_putfh(xdr, args->fh, &hdr);
+ encode_lock(xdr, args, &hdr);
+ encode_nops(&hdr);
+}
+
+/*
+ * Encode a LOCKT request
+ */
+static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
+ struct nfs_lockt_args *args)
+{
+ struct compound_hdr hdr = {
+ .minorversion = nfs4_xdr_minorversion(&args->seq_args),
+ };
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_sequence(xdr, &args->seq_args, &hdr);
+ encode_putfh(xdr, args->fh, &hdr);
+ encode_lockt(xdr, args, &hdr);
+ encode_nops(&hdr);
+}
+
+/*
+ * Encode a LOCKU request
+ */
+static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
+ struct nfs_locku_args *args)
+{
+ struct compound_hdr hdr = {
+ .minorversion = nfs4_xdr_minorversion(&args->seq_args),
+ };
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_sequence(xdr, &args->seq_args, &hdr);
+ encode_putfh(xdr, args->fh, &hdr);
+ encode_locku(xdr, args, &hdr);
+ encode_nops(&hdr);
+}
+
+static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
+ struct xdr_stream *xdr,
+ struct nfs_release_lockowner_args *args)
+{
+ struct compound_hdr hdr = {
+ .minorversion = 0,
+ };
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_release_lockowner(xdr, &args->lock_owner, &hdr);
+ encode_nops(&hdr);
+}
+
+/*
+ * Encode a READLINK request
+ */
+static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
+ const struct nfs4_readlink *args)
+{
+ struct compound_hdr hdr = {
+ .minorversion = nfs4_xdr_minorversion(&args->seq_args),
+ };
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_sequence(xdr, &args->seq_args, &hdr);
+ encode_putfh(xdr, args->fh, &hdr);
+ encode_readlink(xdr, args, req, &hdr);
+
+ xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
+ args->pgbase, args->pglen);
+ encode_nops(&hdr);
+}
+
+/*
+ * Encode a READDIR request
+ */
+static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
+ const struct nfs4_readdir_arg *args)
+{
+ struct compound_hdr hdr = {
+ .minorversion = nfs4_xdr_minorversion(&args->seq_args),
+ };
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_sequence(xdr, &args->seq_args, &hdr);
+ encode_putfh(xdr, args->fh, &hdr);
+ encode_readdir(xdr, args, req, &hdr);
+
+ xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
+ args->pgbase, args->count);
+ dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
+ __func__, hdr.replen << 2, args->pages,
+ args->pgbase, args->count);
+ encode_nops(&hdr);
+}
+
+/*
+ * Encode a READ request
+ */
+static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
+ struct nfs_pgio_args *args)
+{
+ struct compound_hdr hdr = {
+ .minorversion = nfs4_xdr_minorversion(&args->seq_args),
+ };
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_sequence(xdr, &args->seq_args, &hdr);
+ encode_putfh(xdr, args->fh, &hdr);
+ encode_read(xdr, args, &hdr);
+
+ xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
+ args->pages, args->pgbase, args->count);
+ req->rq_rcv_buf.flags |= XDRBUF_READ;
+ encode_nops(&hdr);
+}
+
+/*
+ * Encode an SETATTR request
+ */
+static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
+ struct nfs_setattrargs *args)
+{
+ struct compound_hdr hdr = {
+ .minorversion = nfs4_xdr_minorversion(&args->seq_args),
+ };
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_sequence(xdr, &args->seq_args, &hdr);
+ encode_putfh(xdr, args->fh, &hdr);
+ encode_setattr(xdr, args, args->server, &hdr);
+ encode_getfattr(xdr, args->bitmask, &hdr);
+ encode_nops(&hdr);
+}
+
+/*
+ * Encode a GETACL request
+ */
+static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
+ struct nfs_getaclargs *args)
+{
+ struct compound_hdr hdr = {
+ .minorversion = nfs4_xdr_minorversion(&args->seq_args),
+ };
+ uint32_t replen;
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_sequence(xdr, &args->seq_args, &hdr);
+ encode_putfh(xdr, args->fh, &hdr);
+ replen = hdr.replen + op_decode_hdr_maxsz;
+ encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
+
+ xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
+ args->acl_pages, 0, args->acl_len);
+
+ encode_nops(&hdr);
+}
+
+/*
+ * Encode a WRITE request
+ */
+static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
+ struct nfs_pgio_args *args)
+{
+ struct compound_hdr hdr = {
+ .minorversion = nfs4_xdr_minorversion(&args->seq_args),
+ };
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_sequence(xdr, &args->seq_args, &hdr);
+ encode_putfh(xdr, args->fh, &hdr);
+ encode_write(xdr, args, &hdr);
+ req->rq_snd_buf.flags |= XDRBUF_WRITE;
+ if (args->bitmask)
+ encode_getfattr(xdr, args->bitmask, &hdr);
+ encode_nops(&hdr);
+}
+
+/*
+ * a COMMIT request
+ */
+static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
+ struct nfs_commitargs *args)
+{
+ struct compound_hdr hdr = {
+ .minorversion = nfs4_xdr_minorversion(&args->seq_args),
+ };
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_sequence(xdr, &args->seq_args, &hdr);
+ encode_putfh(xdr, args->fh, &hdr);
+ encode_commit(xdr, args, &hdr);
+ encode_nops(&hdr);
+}
+
+/*
+ * FSINFO request
+ */
+static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
+ struct nfs4_fsinfo_arg *args)
+{
+ struct compound_hdr hdr = {
+ .minorversion = nfs4_xdr_minorversion(&args->seq_args),
+ };
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_sequence(xdr, &args->seq_args, &hdr);
+ encode_putfh(xdr, args->fh, &hdr);
+ encode_fsinfo(xdr, args->bitmask, &hdr);
+ encode_nops(&hdr);
+}
+
+/*
+ * a PATHCONF request
+ */
+static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
+ const struct nfs4_pathconf_arg *args)
+{
+ struct compound_hdr hdr = {
+ .minorversion = nfs4_xdr_minorversion(&args->seq_args),
+ };
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_sequence(xdr, &args->seq_args, &hdr);
+ encode_putfh(xdr, args->fh, &hdr);
+ encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
+ &hdr);
+ encode_nops(&hdr);
+}
+
+/*
+ * a STATFS request
+ */
+static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
+ const struct nfs4_statfs_arg *args)
+{
+ struct compound_hdr hdr = {
+ .minorversion = nfs4_xdr_minorversion(&args->seq_args),
+ };
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_sequence(xdr, &args->seq_args, &hdr);
+ encode_putfh(xdr, args->fh, &hdr);
+ encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
+ args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
+ encode_nops(&hdr);
+}
+
+/*
+ * GETATTR_BITMAP request
+ */
+static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
+ struct xdr_stream *xdr,
+ struct nfs4_server_caps_arg *args)
+{
+ const u32 *bitmask = args->bitmask;
+ struct compound_hdr hdr = {
+ .minorversion = nfs4_xdr_minorversion(&args->seq_args),
+ };
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_sequence(xdr, &args->seq_args, &hdr);
+ encode_putfh(xdr, args->fhandle, &hdr);
+ encode_getattr_three(xdr, bitmask[0], bitmask[1], bitmask[2], &hdr);
+ encode_nops(&hdr);
+}
+
+/*
+ * a RENEW request
+ */
+static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
+ struct nfs_client *clp)
+{
+ struct compound_hdr hdr = {
+ .nops = 0,
+ };
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_renew(xdr, clp->cl_clientid, &hdr);
+ encode_nops(&hdr);
+}
+
+/*
+ * a SETCLIENTID request
+ */
+static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
+ struct xdr_stream *xdr,
+ struct nfs4_setclientid *sc)
+{
+ struct compound_hdr hdr = {
+ .nops = 0,
+ };
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_setclientid(xdr, sc, &hdr);
+ encode_nops(&hdr);
+}
+
+/*
+ * a SETCLIENTID_CONFIRM request
+ */
+static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
+ struct xdr_stream *xdr,
+ struct nfs4_setclientid_res *arg)
+{
+ struct compound_hdr hdr = {
+ .nops = 0,
+ };
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_setclientid_confirm(xdr, arg, &hdr);
+ encode_nops(&hdr);
+}
+
+/*
+ * DELEGRETURN request
+ */
+static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
+ struct xdr_stream *xdr,
+ const struct nfs4_delegreturnargs *args)
+{
+ struct compound_hdr hdr = {
+ .minorversion = nfs4_xdr_minorversion(&args->seq_args),
+ };
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_sequence(xdr, &args->seq_args, &hdr);
+ encode_putfh(xdr, args->fhandle, &hdr);
+ encode_getfattr(xdr, args->bitmask, &hdr);
+ encode_delegreturn(xdr, args->stateid, &hdr);
+ encode_nops(&hdr);
+}
+
+/*
+ * Encode FS_LOCATIONS request
+ */
+static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
+ struct xdr_stream *xdr,
+ struct nfs4_fs_locations_arg *args)
+{
+ struct compound_hdr hdr = {
+ .minorversion = nfs4_xdr_minorversion(&args->seq_args),
+ };
+ uint32_t replen;
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_sequence(xdr, &args->seq_args, &hdr);
+ if (args->migration) {
+ encode_putfh(xdr, args->fh, &hdr);
+ replen = hdr.replen;
+ encode_fs_locations(xdr, args->bitmask, &hdr);
+ if (args->renew)
+ encode_renew(xdr, args->clientid, &hdr);
+ } else {
+ encode_putfh(xdr, args->dir_fh, &hdr);
+ encode_lookup(xdr, args->name, &hdr);
+ replen = hdr.replen;
+ encode_fs_locations(xdr, args->bitmask, &hdr);
+ }
+
+ /* Set up reply kvec to capture returned fs_locations array. */
+ xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
+ 0, PAGE_SIZE);
+ encode_nops(&hdr);
+}
+
+/*
+ * Encode SECINFO request
+ */
+static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
+ struct xdr_stream *xdr,
+ struct nfs4_secinfo_arg *args)
+{
+ struct compound_hdr hdr = {
+ .minorversion = nfs4_xdr_minorversion(&args->seq_args),
+ };
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_sequence(xdr, &args->seq_args, &hdr);
+ encode_putfh(xdr, args->dir_fh, &hdr);
+ encode_secinfo(xdr, args->name, &hdr);
+ encode_nops(&hdr);
+}
+
+/*
+ * Encode FSID_PRESENT request
+ */
+static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req,
+ struct xdr_stream *xdr,
+ struct nfs4_fsid_present_arg *args)
+{
+ struct compound_hdr hdr = {
+ .minorversion = nfs4_xdr_minorversion(&args->seq_args),
+ };
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_sequence(xdr, &args->seq_args, &hdr);
+ encode_putfh(xdr, args->fh, &hdr);
+ encode_getfh(xdr, &hdr);
+ if (args->renew)
+ encode_renew(xdr, args->clientid, &hdr);
+ encode_nops(&hdr);
+}
+
+#if defined(CONFIG_NFS_V4_1)
+/*
+ * BIND_CONN_TO_SESSION request
+ */
+static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,
+ struct xdr_stream *xdr,
+ struct nfs41_bind_conn_to_session_args *args)
+{
+ struct compound_hdr hdr = {
+ .minorversion = args->client->cl_mvops->minor_version,
+ };
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_bind_conn_to_session(xdr, args, &hdr);
+ encode_nops(&hdr);
+}
+
+/*
+ * EXCHANGE_ID request
+ */
+static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
+ struct xdr_stream *xdr,
+ struct nfs41_exchange_id_args *args)
+{
+ struct compound_hdr hdr = {
+ .minorversion = args->client->cl_mvops->minor_version,
+ };
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_exchange_id(xdr, args, &hdr);
+ encode_nops(&hdr);
+}
+
+/*
+ * a CREATE_SESSION request
+ */
+static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
+ struct xdr_stream *xdr,
+ struct nfs41_create_session_args *args)
+{
+ struct compound_hdr hdr = {
+ .minorversion = args->client->cl_mvops->minor_version,
+ };
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_create_session(xdr, args, &hdr);
+ encode_nops(&hdr);
+}
+
+/*
+ * a DESTROY_SESSION request
+ */
+static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
+ struct xdr_stream *xdr,
+ struct nfs4_session *session)
+{
+ struct compound_hdr hdr = {
+ .minorversion = session->clp->cl_mvops->minor_version,
+ };
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_destroy_session(xdr, session, &hdr);
+ encode_nops(&hdr);
+}
+
+/*
+ * a DESTROY_CLIENTID request
+ */
+static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req,
+ struct xdr_stream *xdr,
+ struct nfs_client *clp)
+{
+ struct compound_hdr hdr = {
+ .minorversion = clp->cl_mvops->minor_version,
+ };
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_destroy_clientid(xdr, clp->cl_clientid, &hdr);
+ encode_nops(&hdr);
+}
+
+/*
+ * a SEQUENCE request
+ */
+static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
+ struct nfs4_sequence_args *args)
+{
+ struct compound_hdr hdr = {
+ .minorversion = nfs4_xdr_minorversion(args),
+ };
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_sequence(xdr, args, &hdr);
+ encode_nops(&hdr);
+}
+
+/*
+ * a GET_LEASE_TIME request
+ */
+static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
+ struct xdr_stream *xdr,
+ struct nfs4_get_lease_time_args *args)
+{
+ struct compound_hdr hdr = {
+ .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
+ };
+ const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME };
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_sequence(xdr, &args->la_seq_args, &hdr);
+ encode_putrootfh(xdr, &hdr);
+ encode_fsinfo(xdr, lease_bitmap, &hdr);
+ encode_nops(&hdr);
+}
+
+/*
+ * a RECLAIM_COMPLETE request
+ */
+static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
+ struct xdr_stream *xdr,
+ struct nfs41_reclaim_complete_args *args)
+{
+ struct compound_hdr hdr = {
+ .minorversion = nfs4_xdr_minorversion(&args->seq_args)
+ };
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_sequence(xdr, &args->seq_args, &hdr);
+ encode_reclaim_complete(xdr, args, &hdr);
+ encode_nops(&hdr);
+}
+
+/*
+ * Encode GETDEVICEINFO request
+ */
+static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
+ struct xdr_stream *xdr,
+ struct nfs4_getdeviceinfo_args *args)
+{
+ struct compound_hdr hdr = {
+ .minorversion = nfs4_xdr_minorversion(&args->seq_args),
+ };
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_sequence(xdr, &args->seq_args, &hdr);
+ encode_getdeviceinfo(xdr, args, &hdr);
+
+ /* set up reply kvec. Subtract notification bitmap max size (2)
+ * so that notification bitmap is put in xdr_buf tail */
+ xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
+ args->pdev->pages, args->pdev->pgbase,
+ args->pdev->pglen);
+
+ encode_nops(&hdr);
+}
+
+/*
+ * Encode LAYOUTGET request
+ */
+static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
+ struct xdr_stream *xdr,
+ struct nfs4_layoutget_args *args)
+{
+ struct compound_hdr hdr = {
+ .minorversion = nfs4_xdr_minorversion(&args->seq_args),
+ };
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_sequence(xdr, &args->seq_args, &hdr);
+ encode_putfh(xdr, NFS_FH(args->inode), &hdr);
+ encode_layoutget(xdr, args, &hdr);
+
+ xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
+ args->layout.pages, 0, args->layout.pglen);
+
+ encode_nops(&hdr);
+}
+
+/*
+ * Encode LAYOUTCOMMIT request
+ */
+static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
+ struct xdr_stream *xdr,
+ struct nfs4_layoutcommit_args *args)
+{
+ struct nfs4_layoutcommit_data *data =
+ container_of(args, struct nfs4_layoutcommit_data, args);
+ struct compound_hdr hdr = {
+ .minorversion = nfs4_xdr_minorversion(&args->seq_args),
+ };
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_sequence(xdr, &args->seq_args, &hdr);
+ encode_putfh(xdr, NFS_FH(args->inode), &hdr);
+ encode_layoutcommit(xdr, data->args.inode, args, &hdr);
+ encode_getfattr(xdr, args->bitmask, &hdr);
+ encode_nops(&hdr);
+}
+
+/*
+ * Encode LAYOUTRETURN request
+ */
+static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req,
+ struct xdr_stream *xdr,
+ struct nfs4_layoutreturn_args *args)
+{
+ struct compound_hdr hdr = {
+ .minorversion = nfs4_xdr_minorversion(&args->seq_args),
+ };
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_sequence(xdr, &args->seq_args, &hdr);
+ encode_putfh(xdr, NFS_FH(args->inode), &hdr);
+ encode_layoutreturn(xdr, args, &hdr);
+ encode_nops(&hdr);
+}
+
+/*
+ * Encode SECINFO_NO_NAME request
+ */
+static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
+ struct xdr_stream *xdr,
+ struct nfs41_secinfo_no_name_args *args)
+{
+ struct compound_hdr hdr = {
+ .minorversion = nfs4_xdr_minorversion(&args->seq_args),
+ };
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_sequence(xdr, &args->seq_args, &hdr);
+ encode_putrootfh(xdr, &hdr);
+ encode_secinfo_no_name(xdr, args, &hdr);
+ encode_nops(&hdr);
+ return 0;
+}
+
+/*
+ * Encode TEST_STATEID request
+ */
+static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
+ struct xdr_stream *xdr,
+ struct nfs41_test_stateid_args *args)
+{
+ struct compound_hdr hdr = {
+ .minorversion = nfs4_xdr_minorversion(&args->seq_args),
+ };
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_sequence(xdr, &args->seq_args, &hdr);
+ encode_test_stateid(xdr, args, &hdr);
+ encode_nops(&hdr);
+}
+
+/*
+ * Encode FREE_STATEID request
+ */
+static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
+ struct xdr_stream *xdr,
+ struct nfs41_free_stateid_args *args)
+{
+ struct compound_hdr hdr = {
+ .minorversion = nfs4_xdr_minorversion(&args->seq_args),
+ };
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_sequence(xdr, &args->seq_args, &hdr);
+ encode_free_stateid(xdr, args, &hdr);
+ encode_nops(&hdr);
+}
+#endif /* CONFIG_NFS_V4_1 */
+
+static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
+{
+ dprintk("nfs: %s: prematurely hit end of receive buffer. "
+ "Remaining buffer length is %tu words.\n",
+ func, xdr->end - xdr->p);
+}
+
+static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
+{
+ __be32 *p;
+
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ *len = be32_to_cpup(p);
+ p = xdr_inline_decode(xdr, *len);
+ if (unlikely(!p))
+ goto out_overflow;
+ *string = (char *)p;
+ return 0;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
+{
+ __be32 *p;
+
+ p = xdr_inline_decode(xdr, 8);
+ if (unlikely(!p))
+ goto out_overflow;
+ hdr->status = be32_to_cpup(p++);
+ hdr->taglen = be32_to_cpup(p);
+
+ p = xdr_inline_decode(xdr, hdr->taglen + 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ hdr->tag = (char *)p;
+ p += XDR_QUADLEN(hdr->taglen);
+ hdr->nops = be32_to_cpup(p);
+ if (unlikely(hdr->nops < 1))
+ return nfs4_stat_to_errno(hdr->status);
+ return 0;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
+ int *nfs_retval)
+{
+ __be32 *p;
+ uint32_t opnum;
+ int32_t nfserr;
+
+ p = xdr_inline_decode(xdr, 8);
+ if (unlikely(!p))
+ goto out_overflow;
+ opnum = be32_to_cpup(p++);
+ if (unlikely(opnum != expected))
+ goto out_bad_operation;
+ nfserr = be32_to_cpup(p);
+ if (nfserr == NFS_OK)
+ *nfs_retval = 0;
+ else
+ *nfs_retval = nfs4_stat_to_errno(nfserr);
+ return true;
+out_bad_operation:
+ dprintk("nfs: Server returned operation"
+ " %d but we issued a request for %d\n",
+ opnum, expected);
+ *nfs_retval = -EREMOTEIO;
+ return false;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ *nfs_retval = -EIO;
+ return false;
+}
+
+static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
+{
+ int retval;
+
+ __decode_op_hdr(xdr, expected, &retval);
+ return retval;
+}
+
+/* Dummy routine */
+static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
+{
+ __be32 *p;
+ unsigned int strlen;
+ char *str;
+
+ p = xdr_inline_decode(xdr, 12);
+ if (likely(p))
+ return decode_opaque_inline(xdr, &strlen, &str);
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
+{
+ uint32_t bmlen;
+ __be32 *p;
+
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ bmlen = be32_to_cpup(p);
+
+ bitmap[0] = bitmap[1] = bitmap[2] = 0;
+ p = xdr_inline_decode(xdr, (bmlen << 2));
+ if (unlikely(!p))
+ goto out_overflow;
+ if (bmlen > 0) {
+ bitmap[0] = be32_to_cpup(p++);
+ if (bmlen > 1) {
+ bitmap[1] = be32_to_cpup(p++);
+ if (bmlen > 2)
+ bitmap[2] = be32_to_cpup(p);
+ }
+ }
+ return 0;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep)
+{
+ __be32 *p;
+
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ *attrlen = be32_to_cpup(p);
+ *savep = xdr_stream_pos(xdr);
+ return 0;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
+{
+ if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
+ int ret;
+ ret = decode_attr_bitmap(xdr, bitmask);
+ if (unlikely(ret < 0))
+ return ret;
+ bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
+ } else
+ bitmask[0] = bitmask[1] = bitmask[2] = 0;
+ dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
+ bitmask[0], bitmask[1], bitmask[2]);
+ return 0;
+}
+
+static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
+{
+ __be32 *p;
+ int ret = 0;
+
+ *type = 0;
+ if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
+ return -EIO;
+ if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ *type = be32_to_cpup(p);
+ if (*type < NF4REG || *type > NF4NAMEDATTR) {
+ dprintk("%s: bad type %d\n", __func__, *type);
+ return -EIO;
+ }
+ bitmap[0] &= ~FATTR4_WORD0_TYPE;
+ ret = NFS_ATTR_FATTR_TYPE;
+ }
+ dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
+ return ret;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
+ uint32_t *bitmap, uint32_t *type)
+{
+ __be32 *p;
+
+ *type = 0;
+ if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U)))
+ return -EIO;
+ if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ *type = be32_to_cpup(p);
+ bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
+ }
+ dprintk("%s: expire type=0x%x\n", __func__, *type);
+ return 0;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
+{
+ __be32 *p;
+ int ret = 0;
+
+ *change = 0;
+ if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
+ return -EIO;
+ if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
+ p = xdr_inline_decode(xdr, 8);
+ if (unlikely(!p))
+ goto out_overflow;
+ xdr_decode_hyper(p, change);
+ bitmap[0] &= ~FATTR4_WORD0_CHANGE;
+ ret = NFS_ATTR_FATTR_CHANGE;
+ }
+ dprintk("%s: change attribute=%Lu\n", __func__,
+ (unsigned long long)*change);
+ return ret;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
+{
+ __be32 *p;
+ int ret = 0;
+
+ *size = 0;
+ if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
+ return -EIO;
+ if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
+ p = xdr_inline_decode(xdr, 8);
+ if (unlikely(!p))
+ goto out_overflow;
+ xdr_decode_hyper(p, size);
+ bitmap[0] &= ~FATTR4_WORD0_SIZE;
+ ret = NFS_ATTR_FATTR_SIZE;
+ }
+ dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
+ return ret;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
+{
+ __be32 *p;
+
+ *res = 0;
+ if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
+ return -EIO;
+ if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ *res = be32_to_cpup(p);
+ bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
+ }
+ dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
+ return 0;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
+{
+ __be32 *p;
+
+ *res = 0;
+ if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
+ return -EIO;
+ if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ *res = be32_to_cpup(p);
+ bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
+ }
+ dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
+ return 0;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
+{
+ __be32 *p;
+ int ret = 0;
+
+ fsid->major = 0;
+ fsid->minor = 0;
+ if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
+ return -EIO;
+ if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
+ p = xdr_inline_decode(xdr, 16);
+ if (unlikely(!p))
+ goto out_overflow;
+ p = xdr_decode_hyper(p, &fsid->major);
+ xdr_decode_hyper(p, &fsid->minor);
+ bitmap[0] &= ~FATTR4_WORD0_FSID;
+ ret = NFS_ATTR_FATTR_FSID;
+ }
+ dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
+ (unsigned long long)fsid->major,
+ (unsigned long long)fsid->minor);
+ return ret;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
+{
+ __be32 *p;
+
+ *res = 60;
+ if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
+ return -EIO;
+ if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ *res = be32_to_cpup(p);
+ bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
+ }
+ dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
+ return 0;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
+{
+ __be32 *p;
+
+ if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
+ return -EIO;
+ if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
+ *res = -be32_to_cpup(p);
+ }
+ return 0;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_attr_exclcreat_supported(struct xdr_stream *xdr,
+ uint32_t *bitmap, uint32_t *bitmask)
+{
+ if (likely(bitmap[2] & FATTR4_WORD2_SUPPATTR_EXCLCREAT)) {
+ int ret;
+ ret = decode_attr_bitmap(xdr, bitmask);
+ if (unlikely(ret < 0))
+ return ret;
+ bitmap[2] &= ~FATTR4_WORD2_SUPPATTR_EXCLCREAT;
+ } else
+ bitmask[0] = bitmask[1] = bitmask[2] = 0;
+ dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__,
+ bitmask[0], bitmask[1], bitmask[2]);
+ return 0;
+}
+
+static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
+{
+ __be32 *p;
+ int len;
+
+ if (fh != NULL)
+ memset(fh, 0, sizeof(*fh));
+
+ if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
+ return -EIO;
+ if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ len = be32_to_cpup(p);
+ if (len > NFS4_FHSIZE)
+ return -EIO;
+ p = xdr_inline_decode(xdr, len);
+ if (unlikely(!p))
+ goto out_overflow;
+ if (fh != NULL) {
+ memcpy(fh->data, p, len);
+ fh->size = len;
+ }
+ bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
+ }
+ return 0;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
+{
+ __be32 *p;
+
+ *res = 0;
+ if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
+ return -EIO;
+ if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ *res = be32_to_cpup(p);
+ bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
+ }
+ dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
+ return 0;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
+{
+ __be32 *p;
+ int ret = 0;
+
+ *fileid = 0;
+ if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
+ return -EIO;
+ if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
+ p = xdr_inline_decode(xdr, 8);
+ if (unlikely(!p))
+ goto out_overflow;
+ xdr_decode_hyper(p, fileid);
+ bitmap[0] &= ~FATTR4_WORD0_FILEID;
+ ret = NFS_ATTR_FATTR_FILEID;
+ }
+ dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
+ return ret;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
+{
+ __be32 *p;
+ int ret = 0;
+
+ *fileid = 0;
+ if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
+ return -EIO;
+ if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
+ p = xdr_inline_decode(xdr, 8);
+ if (unlikely(!p))
+ goto out_overflow;
+ xdr_decode_hyper(p, fileid);
+ bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
+ ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
+ }
+ dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
+ return ret;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
+{
+ __be32 *p;
+ int status = 0;
+
+ *res = 0;
+ if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
+ return -EIO;
+ if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
+ p = xdr_inline_decode(xdr, 8);
+ if (unlikely(!p))
+ goto out_overflow;
+ xdr_decode_hyper(p, res);
+ bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
+ }
+ dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
+ return status;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
+{
+ __be32 *p;
+ int status = 0;
+
+ *res = 0;
+ if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
+ return -EIO;
+ if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
+ p = xdr_inline_decode(xdr, 8);
+ if (unlikely(!p))
+ goto out_overflow;
+ xdr_decode_hyper(p, res);
+ bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
+ }
+ dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
+ return status;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
+{
+ __be32 *p;
+ int status = 0;
+
+ *res = 0;
+ if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
+ return -EIO;
+ if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
+ p = xdr_inline_decode(xdr, 8);
+ if (unlikely(!p))
+ goto out_overflow;
+ xdr_decode_hyper(p, res);
+ bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
+ }
+ dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
+ return status;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
+{
+ u32 n;
+ __be32 *p;
+ int status = 0;
+
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ n = be32_to_cpup(p);
+ if (n == 0)
+ goto root_path;
+ dprintk("pathname4: ");
+ if (n > NFS4_PATHNAME_MAXCOMPONENTS) {
+ dprintk("cannot parse %d components in path\n", n);
+ goto out_eio;
+ }
+ for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) {
+ struct nfs4_string *component = &path->components[path->ncomponents];
+ status = decode_opaque_inline(xdr, &component->len, &component->data);
+ if (unlikely(status != 0))
+ goto out_eio;
+ ifdebug (XDR)
+ pr_cont("%s%.*s ",
+ (path->ncomponents != n ? "/ " : ""),
+ component->len, component->data);
+ }
+out:
+ return status;
+root_path:
+/* a root pathname is sent as a zero component4 */
+ path->ncomponents = 1;
+ path->components[0].len=0;
+ path->components[0].data=NULL;
+ dprintk("pathname4: /\n");
+ goto out;
+out_eio:
+ dprintk(" status %d", status);
+ status = -EIO;
+ goto out;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
+{
+ int n;
+ __be32 *p;
+ int status = -EIO;
+
+ if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
+ goto out;
+ status = 0;
+ if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
+ goto out;
+ bitmap[0] &= ~FATTR4_WORD0_FS_LOCATIONS;
+ status = -EIO;
+ /* Ignore borken servers that return unrequested attrs */
+ if (unlikely(res == NULL))
+ goto out;
+ dprintk("%s: fsroot:\n", __func__);
+ status = decode_pathname(xdr, &res->fs_path);
+ if (unlikely(status != 0))
+ goto out;
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ n = be32_to_cpup(p);
+ if (n <= 0)
+ goto out_eio;
+ for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
+ u32 m;
+ struct nfs4_fs_location *loc;
+
+ if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES)
+ break;
+ loc = &res->locations[res->nlocations];
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ m = be32_to_cpup(p);
+
+ dprintk("%s: servers:\n", __func__);
+ for (loc->nservers = 0; loc->nservers < m; loc->nservers++) {
+ struct nfs4_string *server;
+
+ if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) {
+ unsigned int i;
+ dprintk("%s: using first %u of %u servers "
+ "returned for location %u\n",
+ __func__,
+ NFS4_FS_LOCATION_MAXSERVERS,
+ m, res->nlocations);
+ for (i = loc->nservers; i < m; i++) {
+ unsigned int len;
+ char *data;
+ status = decode_opaque_inline(xdr, &len, &data);
+ if (unlikely(status != 0))
+ goto out_eio;
+ }
+ break;
+ }
+ server = &loc->servers[loc->nservers];
+ status = decode_opaque_inline(xdr, &server->len, &server->data);
+ if (unlikely(status != 0))
+ goto out_eio;
+ dprintk("%s ", server->data);
+ }
+ status = decode_pathname(xdr, &loc->rootpath);
+ if (unlikely(status != 0))
+ goto out_eio;
+ }
+ if (res->nlocations != 0)
+ status = NFS_ATTR_FATTR_V4_LOCATIONS;
+out:
+ dprintk("%s: fs_locations done, error = %d\n", __func__, status);
+ return status;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+out_eio:
+ status = -EIO;
+ goto out;
+}
+
+static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
+{
+ __be32 *p;
+ int status = 0;
+
+ *res = 0;
+ if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
+ return -EIO;
+ if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
+ p = xdr_inline_decode(xdr, 8);
+ if (unlikely(!p))
+ goto out_overflow;
+ xdr_decode_hyper(p, res);
+ bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
+ }
+ dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
+ return status;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
+{
+ __be32 *p;
+ int status = 0;
+
+ *maxlink = 1;
+ if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
+ return -EIO;
+ if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ *maxlink = be32_to_cpup(p);
+ bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
+ }
+ dprintk("%s: maxlink=%u\n", __func__, *maxlink);
+ return status;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
+{
+ __be32 *p;
+ int status = 0;
+
+ *maxname = 1024;
+ if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
+ return -EIO;
+ if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ *maxname = be32_to_cpup(p);
+ bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
+ }
+ dprintk("%s: maxname=%u\n", __func__, *maxname);
+ return status;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
+{
+ __be32 *p;
+ int status = 0;
+
+ *res = 1024;
+ if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
+ return -EIO;
+ if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
+ uint64_t maxread;
+ p = xdr_inline_decode(xdr, 8);
+ if (unlikely(!p))
+ goto out_overflow;
+ xdr_decode_hyper(p, &maxread);
+ if (maxread > 0x7FFFFFFF)
+ maxread = 0x7FFFFFFF;
+ *res = (uint32_t)maxread;
+ bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
+ }
+ dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
+ return status;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
+{
+ __be32 *p;
+ int status = 0;
+
+ *res = 1024;
+ if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
+ return -EIO;
+ if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
+ uint64_t maxwrite;
+ p = xdr_inline_decode(xdr, 8);
+ if (unlikely(!p))
+ goto out_overflow;
+ xdr_decode_hyper(p, &maxwrite);
+ if (maxwrite > 0x7FFFFFFF)
+ maxwrite = 0x7FFFFFFF;
+ *res = (uint32_t)maxwrite;
+ bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
+ }
+ dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
+ return status;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
+{
+ uint32_t tmp;
+ __be32 *p;
+ int ret = 0;
+
+ *mode = 0;
+ if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
+ return -EIO;
+ if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ tmp = be32_to_cpup(p);
+ *mode = tmp & ~S_IFMT;
+ bitmap[1] &= ~FATTR4_WORD1_MODE;
+ ret = NFS_ATTR_FATTR_MODE;
+ }
+ dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
+ return ret;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
+{
+ __be32 *p;
+ int ret = 0;
+
+ *nlink = 1;
+ if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
+ return -EIO;
+ if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ *nlink = be32_to_cpup(p);
+ bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
+ ret = NFS_ATTR_FATTR_NLINK;
+ }
+ dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
+ return ret;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
+ const struct nfs_server *server, kuid_t *uid,
+ struct nfs4_string *owner_name)
+{
+ uint32_t len;
+ __be32 *p;
+ int ret = 0;
+
+ *uid = make_kuid(&init_user_ns, -2);
+ if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
+ return -EIO;
+ if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ len = be32_to_cpup(p);
+ p = xdr_inline_decode(xdr, len);
+ if (unlikely(!p))
+ goto out_overflow;
+ if (owner_name != NULL) {
+ owner_name->data = kmemdup(p, len, GFP_NOWAIT);
+ if (owner_name->data != NULL) {
+ owner_name->len = len;
+ ret = NFS_ATTR_FATTR_OWNER_NAME;
+ }
+ } else if (len < XDR_MAX_NETOBJ) {
+ if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
+ ret = NFS_ATTR_FATTR_OWNER;
+ else
+ dprintk("%s: nfs_map_name_to_uid failed!\n",
+ __func__);
+ } else
+ dprintk("%s: name too long (%u)!\n",
+ __func__, len);
+ bitmap[1] &= ~FATTR4_WORD1_OWNER;
+ }
+ dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid));
+ return ret;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
+ const struct nfs_server *server, kgid_t *gid,
+ struct nfs4_string *group_name)
+{
+ uint32_t len;
+ __be32 *p;
+ int ret = 0;
+
+ *gid = make_kgid(&init_user_ns, -2);
+ if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
+ return -EIO;
+ if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ len = be32_to_cpup(p);
+ p = xdr_inline_decode(xdr, len);
+ if (unlikely(!p))
+ goto out_overflow;
+ if (group_name != NULL) {
+ group_name->data = kmemdup(p, len, GFP_NOWAIT);
+ if (group_name->data != NULL) {
+ group_name->len = len;
+ ret = NFS_ATTR_FATTR_GROUP_NAME;
+ }
+ } else if (len < XDR_MAX_NETOBJ) {
+ if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
+ ret = NFS_ATTR_FATTR_GROUP;
+ else
+ dprintk("%s: nfs_map_group_to_gid failed!\n",
+ __func__);
+ } else
+ dprintk("%s: name too long (%u)!\n",
+ __func__, len);
+ bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
+ }
+ dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid));
+ return ret;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
+{
+ uint32_t major = 0, minor = 0;
+ __be32 *p;
+ int ret = 0;
+
+ *rdev = MKDEV(0,0);
+ if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
+ return -EIO;
+ if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
+ dev_t tmp;
+
+ p = xdr_inline_decode(xdr, 8);
+ if (unlikely(!p))
+ goto out_overflow;
+ major = be32_to_cpup(p++);
+ minor = be32_to_cpup(p);
+ tmp = MKDEV(major, minor);
+ if (MAJOR(tmp) == major && MINOR(tmp) == minor)
+ *rdev = tmp;
+ bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
+ ret = NFS_ATTR_FATTR_RDEV;
+ }
+ dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
+ return ret;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
+{
+ __be32 *p;
+ int status = 0;
+
+ *res = 0;
+ if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
+ return -EIO;
+ if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
+ p = xdr_inline_decode(xdr, 8);
+ if (unlikely(!p))
+ goto out_overflow;
+ xdr_decode_hyper(p, res);
+ bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
+ }
+ dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
+ return status;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
+{
+ __be32 *p;
+ int status = 0;
+
+ *res = 0;
+ if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
+ return -EIO;
+ if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
+ p = xdr_inline_decode(xdr, 8);
+ if (unlikely(!p))
+ goto out_overflow;
+ xdr_decode_hyper(p, res);
+ bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
+ }
+ dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
+ return status;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
+{
+ __be32 *p;
+ int status = 0;
+
+ *res = 0;
+ if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
+ return -EIO;
+ if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
+ p = xdr_inline_decode(xdr, 8);
+ if (unlikely(!p))
+ goto out_overflow;
+ xdr_decode_hyper(p, res);
+ bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
+ }
+ dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
+ return status;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
+{
+ __be32 *p;
+ int ret = 0;
+
+ *used = 0;
+ if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
+ return -EIO;
+ if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
+ p = xdr_inline_decode(xdr, 8);
+ if (unlikely(!p))
+ goto out_overflow;
+ xdr_decode_hyper(p, used);
+ bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
+ ret = NFS_ATTR_FATTR_SPACE_USED;
+ }
+ dprintk("%s: space used=%Lu\n", __func__,
+ (unsigned long long)*used);
+ return ret;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
+{
+ __be32 *p;
+ uint64_t sec;
+ uint32_t nsec;
+
+ p = xdr_inline_decode(xdr, 12);
+ if (unlikely(!p))
+ goto out_overflow;
+ p = xdr_decode_hyper(p, &sec);
+ nsec = be32_to_cpup(p);
+ time->tv_sec = (time_t)sec;
+ time->tv_nsec = (long)nsec;
+ return 0;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
+{
+ int status = 0;
+
+ time->tv_sec = 0;
+ time->tv_nsec = 0;
+ if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
+ return -EIO;
+ if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
+ status = decode_attr_time(xdr, time);
+ if (status == 0)
+ status = NFS_ATTR_FATTR_ATIME;
+ bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
+ }
+ dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
+ return status;
+}
+
+static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
+{
+ int status = 0;
+
+ time->tv_sec = 0;
+ time->tv_nsec = 0;
+ if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
+ return -EIO;
+ if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
+ status = decode_attr_time(xdr, time);
+ if (status == 0)
+ status = NFS_ATTR_FATTR_CTIME;
+ bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
+ }
+ dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
+ return status;
+}
+
+static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
+ struct timespec *time)
+{
+ int status = 0;
+
+ time->tv_sec = 0;
+ time->tv_nsec = 0;
+ if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
+ return -EIO;
+ if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
+ status = decode_attr_time(xdr, time);
+ bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
+ }
+ dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
+ (long)time->tv_nsec);
+ return status;
+}
+
+static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
+ struct nfs4_label *label)
+{
+ uint32_t pi = 0;
+ uint32_t lfs = 0;
+ __u32 len;
+ __be32 *p;
+ int status = 0;
+
+ if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
+ return -EIO;
+ if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ lfs = be32_to_cpup(p++);
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ pi = be32_to_cpup(p++);
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ len = be32_to_cpup(p++);
+ p = xdr_inline_decode(xdr, len);
+ if (unlikely(!p))
+ goto out_overflow;
+ if (len < NFS4_MAXLABELLEN) {
+ if (label) {
+ memcpy(label->label, p, len);
+ label->len = len;
+ label->pi = pi;
+ label->lfs = lfs;
+ status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
+ }
+ bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
+ } else
+ printk(KERN_WARNING "%s: label too long (%u)!\n",
+ __func__, len);
+ }
+ if (label && label->label)
+ dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
+ (char *)label->label, label->len, label->pi, label->lfs);
+ return status;
+
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
+{
+ int status = 0;
+
+ time->tv_sec = 0;
+ time->tv_nsec = 0;
+ if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
+ return -EIO;
+ if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
+ status = decode_attr_time(xdr, time);
+ if (status == 0)
+ status = NFS_ATTR_FATTR_MTIME;
+ bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
+ }
+ dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
+ return status;
+}
+
+static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen)
+{
+ unsigned int attrwords = XDR_QUADLEN(attrlen);
+ unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2;
+
+ if (unlikely(attrwords != nwords)) {
+ dprintk("%s: server returned incorrect attribute length: "
+ "%u %c %u\n",
+ __func__,
+ attrwords << 2,
+ (attrwords < nwords) ? '<' : '>',
+ nwords << 2);
+ return -EIO;
+ }
+ return 0;
+}
+
+static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
+{
+ __be32 *p;
+
+ p = xdr_inline_decode(xdr, 20);
+ if (unlikely(!p))
+ goto out_overflow;
+ cinfo->atomic = be32_to_cpup(p++);
+ p = xdr_decode_hyper(p, &cinfo->before);
+ xdr_decode_hyper(p, &cinfo->after);
+ return 0;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
+{
+ __be32 *p;
+ uint32_t supp, acc;
+ int status;
+
+ status = decode_op_hdr(xdr, OP_ACCESS);
+ if (status)
+ return status;
+ p = xdr_inline_decode(xdr, 8);
+ if (unlikely(!p))
+ goto out_overflow;
+ supp = be32_to_cpup(p++);
+ acc = be32_to_cpup(p);
+ *supported = supp;
+ *access = acc;
+ return 0;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
+{
+ __be32 *p;
+
+ p = xdr_inline_decode(xdr, len);
+ if (likely(p)) {
+ memcpy(buf, p, len);
+ return 0;
+ }
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
+{
+ return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE);
+}
+
+static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
+{
+ int status;
+
+ status = decode_op_hdr(xdr, OP_CLOSE);
+ if (status != -EIO)
+ nfs_increment_open_seqid(status, res->seqid);
+ if (!status)
+ status = decode_stateid(xdr, &res->stateid);
+ return status;
+}
+
+static int decode_verifier(struct xdr_stream *xdr, void *verifier)
+{
+ return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE);
+}
+
+static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
+{
+ return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE);
+}
+
+static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res)
+{
+ int status;
+
+ status = decode_op_hdr(xdr, OP_COMMIT);
+ if (!status)
+ status = decode_write_verifier(xdr, &res->verf->verifier);
+ return status;
+}
+
+static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
+{
+ __be32 *p;
+ uint32_t bmlen;
+ int status;
+
+ status = decode_op_hdr(xdr, OP_CREATE);
+ if (status)
+ return status;
+ if ((status = decode_change_info(xdr, cinfo)))
+ return status;
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ bmlen = be32_to_cpup(p);
+ p = xdr_inline_decode(xdr, bmlen << 2);
+ if (likely(p))
+ return 0;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
+{
+ unsigned int savep;
+ uint32_t attrlen, bitmap[3] = {0};
+ int status;
+
+ if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
+ goto xdr_error;
+ if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
+ goto xdr_error;
+ if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
+ goto xdr_error;
+ if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
+ goto xdr_error;
+ if ((status = decode_attr_fh_expire_type(xdr, bitmap,
+ &res->fh_expire_type)) != 0)
+ goto xdr_error;
+ if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
+ goto xdr_error;
+ if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
+ goto xdr_error;
+ if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
+ goto xdr_error;
+ if ((status = decode_attr_exclcreat_supported(xdr, bitmap,
+ res->exclcreat_bitmask)) != 0)
+ goto xdr_error;
+ status = verify_attr_len(xdr, savep, attrlen);
+xdr_error:
+ dprintk("%s: xdr returned %d!\n", __func__, -status);
+ return status;
+}
+
+static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
+{
+ unsigned int savep;
+ uint32_t attrlen, bitmap[3] = {0};
+ int status;
+
+ if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
+ goto xdr_error;
+ if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
+ goto xdr_error;
+ if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
+ goto xdr_error;
+
+ if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
+ goto xdr_error;
+ if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
+ goto xdr_error;
+ if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
+ goto xdr_error;
+
+ status = -EIO;
+ if (unlikely(bitmap[0]))
+ goto xdr_error;
+
+ if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
+ goto xdr_error;
+ if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
+ goto xdr_error;
+ if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
+ goto xdr_error;
+
+ status = verify_attr_len(xdr, savep, attrlen);
+xdr_error:
+ dprintk("%s: xdr returned %d!\n", __func__, -status);
+ return status;
+}
+
+static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
+{
+ unsigned int savep;
+ uint32_t attrlen, bitmap[3] = {0};
+ int status;
+
+ if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
+ goto xdr_error;
+ if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
+ goto xdr_error;
+ if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
+ goto xdr_error;
+
+ if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
+ goto xdr_error;
+ if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
+ goto xdr_error;
+
+ status = verify_attr_len(xdr, savep, attrlen);
+xdr_error:
+ dprintk("%s: xdr returned %d!\n", __func__, -status);
+ return status;
+}
+
+static int decode_threshold_hint(struct xdr_stream *xdr,
+ uint32_t *bitmap,
+ uint64_t *res,
+ uint32_t hint_bit)
+{
+ __be32 *p;
+
+ *res = 0;
+ if (likely(bitmap[0] & hint_bit)) {
+ p = xdr_inline_decode(xdr, 8);
+ if (unlikely(!p))
+ goto out_overflow;
+ xdr_decode_hyper(p, res);
+ }
+ return 0;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_first_threshold_item4(struct xdr_stream *xdr,
+ struct nfs4_threshold *res)
+{
+ __be32 *p;
+ unsigned int savep;
+ uint32_t bitmap[3] = {0,}, attrlen;
+ int status;
+
+ /* layout type */
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p)) {
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+ }
+ res->l_type = be32_to_cpup(p);
+
+ /* thi_hintset bitmap */
+ status = decode_attr_bitmap(xdr, bitmap);
+ if (status < 0)
+ goto xdr_error;
+
+ /* thi_hintlist length */
+ status = decode_attr_length(xdr, &attrlen, &savep);
+ if (status < 0)
+ goto xdr_error;
+ /* thi_hintlist */
+ status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD);
+ if (status < 0)
+ goto xdr_error;
+ status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR);
+ if (status < 0)
+ goto xdr_error;
+ status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz,
+ THRESHOLD_RD_IO);
+ if (status < 0)
+ goto xdr_error;
+ status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz,
+ THRESHOLD_WR_IO);
+ if (status < 0)
+ goto xdr_error;
+
+ status = verify_attr_len(xdr, savep, attrlen);
+ res->bm = bitmap[0];
+
+ dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n",
+ __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz,
+ res->wr_io_sz);
+xdr_error:
+ dprintk("%s ret=%d!\n", __func__, status);
+ return status;
+}
+
+/*
+ * Thresholds on pNFS direct I/O vrs MDS I/O
+ */
+static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
+ uint32_t *bitmap,
+ struct nfs4_threshold *res)
+{
+ __be32 *p;
+ int status = 0;
+ uint32_t num;
+
+ if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U)))
+ return -EIO;
+ if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) {
+ /* Did the server return an unrequested attribute? */
+ if (unlikely(res == NULL))
+ return -EREMOTEIO;
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ num = be32_to_cpup(p);
+ if (num == 0)
+ return 0;
+ if (num > 1)
+ printk(KERN_INFO "%s: Warning: Multiple pNFS layout "
+ "drivers per filesystem not supported\n",
+ __func__);
+
+ status = decode_first_threshold_item4(xdr, res);
+ bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
+ }
+ return status;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
+ struct nfs_fattr *fattr, struct nfs_fh *fh,
+ struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
+ const struct nfs_server *server)
+{
+ int status;
+ umode_t fmode = 0;
+ uint32_t type;
+ int32_t err;
+
+ status = decode_attr_type(xdr, bitmap, &type);
+ if (status < 0)
+ goto xdr_error;
+ fattr->mode = 0;
+ if (status != 0) {
+ fattr->mode |= nfs_type2fmt[type];
+ fattr->valid |= status;
+ }
+
+ status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
+ if (status < 0)
+ goto xdr_error;
+ fattr->valid |= status;
+
+ status = decode_attr_size(xdr, bitmap, &fattr->size);
+ if (status < 0)
+ goto xdr_error;
+ fattr->valid |= status;
+
+ status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
+ if (status < 0)
+ goto xdr_error;
+ fattr->valid |= status;
+
+ err = 0;
+ status = decode_attr_error(xdr, bitmap, &err);
+ if (status < 0)
+ goto xdr_error;
+
+ status = decode_attr_filehandle(xdr, bitmap, fh);
+ if (status < 0)
+ goto xdr_error;
+
+ status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
+ if (status < 0)
+ goto xdr_error;
+ fattr->valid |= status;
+
+ status = decode_attr_fs_locations(xdr, bitmap, fs_loc);
+ if (status < 0)
+ goto xdr_error;
+ fattr->valid |= status;
+
+ status = -EIO;
+ if (unlikely(bitmap[0]))
+ goto xdr_error;
+
+ status = decode_attr_mode(xdr, bitmap, &fmode);
+ if (status < 0)
+ goto xdr_error;
+ if (status != 0) {
+ fattr->mode |= fmode;
+ fattr->valid |= status;
+ }
+
+ status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
+ if (status < 0)
+ goto xdr_error;
+ fattr->valid |= status;
+
+ status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name);
+ if (status < 0)
+ goto xdr_error;
+ fattr->valid |= status;
+
+ status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name);
+ if (status < 0)
+ goto xdr_error;
+ fattr->valid |= status;
+
+ status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
+ if (status < 0)
+ goto xdr_error;
+ fattr->valid |= status;
+
+ status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
+ if (status < 0)
+ goto xdr_error;
+ fattr->valid |= status;
+
+ status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
+ if (status < 0)
+ goto xdr_error;
+ fattr->valid |= status;
+
+ status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
+ if (status < 0)
+ goto xdr_error;
+ fattr->valid |= status;
+
+ status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
+ if (status < 0)
+ goto xdr_error;
+ fattr->valid |= status;
+
+ status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid);
+ if (status < 0)
+ goto xdr_error;
+ fattr->valid |= status;
+
+ status = -EIO;
+ if (unlikely(bitmap[1]))
+ goto xdr_error;
+
+ status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold);
+ if (status < 0)
+ goto xdr_error;
+
+ if (label) {
+ status = decode_attr_security_label(xdr, bitmap, label);
+ if (status < 0)
+ goto xdr_error;
+ fattr->valid |= status;
+ }
+
+xdr_error:
+ dprintk("%s: xdr returned %d\n", __func__, -status);
+ return status;
+}
+
+static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
+ struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
+ struct nfs4_label *label, const struct nfs_server *server)
+{
+ unsigned int savep;
+ uint32_t attrlen,
+ bitmap[3] = {0};
+ int status;
+
+ status = decode_op_hdr(xdr, OP_GETATTR);
+ if (status < 0)
+ goto xdr_error;
+
+ status = decode_attr_bitmap(xdr, bitmap);
+ if (status < 0)
+ goto xdr_error;
+
+ status = decode_attr_length(xdr, &attrlen, &savep);
+ if (status < 0)
+ goto xdr_error;
+
+ status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
+ label, server);
+ if (status < 0)
+ goto xdr_error;
+
+ status = verify_attr_len(xdr, savep, attrlen);
+xdr_error:
+ dprintk("%s: xdr returned %d\n", __func__, -status);
+ return status;
+}
+
+static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
+ struct nfs4_label *label, const struct nfs_server *server)
+{
+ return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
+}
+
+static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
+ const struct nfs_server *server)
+{
+ return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
+}
+
+/*
+ * Decode potentially multiple layout types. Currently we only support
+ * one layout driver per file system.
+ */
+static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
+ uint32_t *layouttype)
+{
+ __be32 *p;
+ int num;
+
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ num = be32_to_cpup(p);
+
+ /* pNFS is not supported by the underlying file system */
+ if (num == 0) {
+ *layouttype = 0;
+ return 0;
+ }
+ if (num > 1)
+ printk(KERN_INFO "NFS: %s: Warning: Multiple pNFS layout "
+ "drivers per filesystem not supported\n", __func__);
+
+ /* Decode and set first layout type, move xdr->p past unused types */
+ p = xdr_inline_decode(xdr, num * 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ *layouttype = be32_to_cpup(p);
+ return 0;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+/*
+ * The type of file system exported.
+ * Note we must ensure that layouttype is set in any non-error case.
+ */
+static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
+ uint32_t *layouttype)
+{
+ int status = 0;
+
+ dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
+ if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
+ return -EIO;
+ if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
+ status = decode_first_pnfs_layout_type(xdr, layouttype);
+ bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
+ } else
+ *layouttype = 0;
+ return status;
+}
+
+/*
+ * The prefered block size for layout directed io
+ */
+static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
+ uint32_t *res)
+{
+ __be32 *p;
+
+ dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
+ *res = 0;
+ if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p)) {
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+ }
+ *res = be32_to_cpup(p);
+ bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
+ }
+ return 0;
+}
+
+/*
+ * The granularity of a CLONE operation.
+ */
+static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
+ uint32_t *res)
+{
+ __be32 *p;
+
+ dprintk("%s: bitmap is %x\n", __func__, bitmap[2]);
+ *res = 0;
+ if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p)) {
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+ }
+ *res = be32_to_cpup(p);
+ bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
+ }
+ return 0;
+}
+
+static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
+{
+ unsigned int savep;
+ uint32_t attrlen, bitmap[3];
+ int status;
+
+ if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
+ goto xdr_error;
+ if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
+ goto xdr_error;
+ if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
+ goto xdr_error;
+
+ fsinfo->rtmult = fsinfo->wtmult = 512; /* ??? */
+
+ if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
+ goto xdr_error;
+ if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
+ goto xdr_error;
+ if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
+ goto xdr_error;
+ fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
+ if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
+ goto xdr_error;
+ fsinfo->wtpref = fsinfo->wtmax;
+
+ status = -EIO;
+ if (unlikely(bitmap[0]))
+ goto xdr_error;
+
+ status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
+ if (status != 0)
+ goto xdr_error;
+ status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
+ if (status != 0)
+ goto xdr_error;
+
+ status = -EIO;
+ if (unlikely(bitmap[1]))
+ goto xdr_error;
+
+ status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize);
+ if (status)
+ goto xdr_error;
+ status = decode_attr_clone_blksize(xdr, bitmap, &fsinfo->clone_blksize);
+ if (status)
+ goto xdr_error;
+
+ status = verify_attr_len(xdr, savep, attrlen);
+xdr_error:
+ dprintk("%s: xdr returned %d!\n", __func__, -status);
+ return status;
+}
+
+static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
+{
+ __be32 *p;
+ uint32_t len;
+ int status;
+
+ /* Zero handle first to allow comparisons */
+ memset(fh, 0, sizeof(*fh));
+
+ status = decode_op_hdr(xdr, OP_GETFH);
+ if (status)
+ return status;
+
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ len = be32_to_cpup(p);
+ if (len > NFS4_FHSIZE)
+ return -EIO;
+ fh->size = len;
+ p = xdr_inline_decode(xdr, len);
+ if (unlikely(!p))
+ goto out_overflow;
+ memcpy(fh->data, p, len);
+ return 0;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
+{
+ int status;
+
+ status = decode_op_hdr(xdr, OP_LINK);
+ if (status)
+ return status;
+ return decode_change_info(xdr, cinfo);
+}
+
+/*
+ * We create the owner, so we know a proper owner.id length is 4.
+ */
+static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
+{
+ uint64_t offset, length, clientid;
+ __be32 *p;
+ uint32_t namelen, type;
+
+ p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
+ if (unlikely(!p))
+ goto out_overflow;
+ p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
+ p = xdr_decode_hyper(p, &length);
+ type = be32_to_cpup(p++); /* 4 byte read */
+ if (fl != NULL) { /* manipulate file lock */
+ fl->fl_start = (loff_t)offset;
+ fl->fl_end = fl->fl_start + (loff_t)length - 1;
+ if (length == ~(uint64_t)0)
+ fl->fl_end = OFFSET_MAX;
+ fl->fl_type = F_WRLCK;
+ if (type & 1)
+ fl->fl_type = F_RDLCK;
+ fl->fl_pid = 0;
+ }
+ p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
+ namelen = be32_to_cpup(p); /* read 4 bytes */ /* have read all 32 bytes now */
+ p = xdr_inline_decode(xdr, namelen); /* variable size field */
+ if (likely(p))
+ return -NFS4ERR_DENIED;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
+{
+ int status;
+
+ status = decode_op_hdr(xdr, OP_LOCK);
+ if (status == -EIO)
+ goto out;
+ if (status == 0) {
+ status = decode_stateid(xdr, &res->stateid);
+ if (unlikely(status))
+ goto out;
+ } else if (status == -NFS4ERR_DENIED)
+ status = decode_lock_denied(xdr, NULL);
+ if (res->open_seqid != NULL)
+ nfs_increment_open_seqid(status, res->open_seqid);
+ nfs_increment_lock_seqid(status, res->lock_seqid);
+out:
+ return status;
+}
+
+static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
+{
+ int status;
+ status = decode_op_hdr(xdr, OP_LOCKT);
+ if (status == -NFS4ERR_DENIED)
+ return decode_lock_denied(xdr, res->denied);
+ return status;
+}
+
+static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
+{
+ int status;
+
+ status = decode_op_hdr(xdr, OP_LOCKU);
+ if (status != -EIO)
+ nfs_increment_lock_seqid(status, res->seqid);
+ if (status == 0)
+ status = decode_stateid(xdr, &res->stateid);
+ return status;
+}
+
+static int decode_release_lockowner(struct xdr_stream *xdr)
+{
+ return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
+}
+
+static int decode_lookup(struct xdr_stream *xdr)
+{
+ return decode_op_hdr(xdr, OP_LOOKUP);
+}
+
+/* This is too sick! */
+static int decode_space_limit(struct xdr_stream *xdr,
+ unsigned long *pagemod_limit)
+{
+ __be32 *p;
+ uint32_t limit_type, nblocks, blocksize;
+ u64 maxsize = 0;
+
+ p = xdr_inline_decode(xdr, 12);
+ if (unlikely(!p))
+ goto out_overflow;
+ limit_type = be32_to_cpup(p++);
+ switch (limit_type) {
+ case NFS4_LIMIT_SIZE:
+ xdr_decode_hyper(p, &maxsize);
+ break;
+ case NFS4_LIMIT_BLOCKS:
+ nblocks = be32_to_cpup(p++);
+ blocksize = be32_to_cpup(p);
+ maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
+ }
+ maxsize >>= PAGE_CACHE_SHIFT;
+ *pagemod_limit = min_t(u64, maxsize, ULONG_MAX);
+ return 0;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_rw_delegation(struct xdr_stream *xdr,
+ uint32_t delegation_type,
+ struct nfs_openres *res)
+{
+ __be32 *p;
+ int status;
+
+ status = decode_stateid(xdr, &res->delegation);
+ if (unlikely(status))
+ return status;
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ res->do_recall = be32_to_cpup(p);
+
+ switch (delegation_type) {
+ case NFS4_OPEN_DELEGATE_READ:
+ res->delegation_type = FMODE_READ;
+ break;
+ case NFS4_OPEN_DELEGATE_WRITE:
+ res->delegation_type = FMODE_WRITE|FMODE_READ;
+ if (decode_space_limit(xdr, &res->pagemod_limit) < 0)
+ return -EIO;
+ }
+ return decode_ace(xdr, NULL, res->server->nfs_client);
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
+{
+ __be32 *p;
+ uint32_t why_no_delegation;
+
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ why_no_delegation = be32_to_cpup(p);
+ switch (why_no_delegation) {
+ case WND4_CONTENTION:
+ case WND4_RESOURCE:
+ xdr_inline_decode(xdr, 4);
+ /* Ignore for now */
+ }
+ return 0;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
+{
+ __be32 *p;
+ uint32_t delegation_type;
+
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ delegation_type = be32_to_cpup(p);
+ res->delegation_type = 0;
+ switch (delegation_type) {
+ case NFS4_OPEN_DELEGATE_NONE:
+ return 0;
+ case NFS4_OPEN_DELEGATE_READ:
+ case NFS4_OPEN_DELEGATE_WRITE:
+ return decode_rw_delegation(xdr, delegation_type, res);
+ case NFS4_OPEN_DELEGATE_NONE_EXT:
+ return decode_no_delegation(xdr, res);
+ }
+ return -EIO;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
+{
+ __be32 *p;
+ uint32_t savewords, bmlen, i;
+ int status;
+
+ if (!__decode_op_hdr(xdr, OP_OPEN, &status))
+ return status;
+ nfs_increment_open_seqid(status, res->seqid);
+ if (status)
+ return status;
+ status = decode_stateid(xdr, &res->stateid);
+ if (unlikely(status))
+ return status;
+
+ decode_change_info(xdr, &res->cinfo);
+
+ p = xdr_inline_decode(xdr, 8);
+ if (unlikely(!p))
+ goto out_overflow;
+ res->rflags = be32_to_cpup(p++);
+ bmlen = be32_to_cpup(p);
+ if (bmlen > 10)
+ goto xdr_error;
+
+ p = xdr_inline_decode(xdr, bmlen << 2);
+ if (unlikely(!p))
+ goto out_overflow;
+ savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
+ for (i = 0; i < savewords; ++i)
+ res->attrset[i] = be32_to_cpup(p++);
+ for (; i < NFS4_BITMAP_SIZE; i++)
+ res->attrset[i] = 0;
+
+ return decode_delegation(xdr, res);
+xdr_error:
+ dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
+ return -EIO;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
+{
+ int status;
+
+ status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
+ if (status != -EIO)
+ nfs_increment_open_seqid(status, res->seqid);
+ if (!status)
+ status = decode_stateid(xdr, &res->stateid);
+ return status;
+}
+
+static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
+{
+ int status;
+
+ status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
+ if (status != -EIO)
+ nfs_increment_open_seqid(status, res->seqid);
+ if (!status)
+ status = decode_stateid(xdr, &res->stateid);
+ return status;
+}
+
+static int decode_putfh(struct xdr_stream *xdr)
+{
+ return decode_op_hdr(xdr, OP_PUTFH);
+}
+
+static int decode_putrootfh(struct xdr_stream *xdr)
+{
+ return decode_op_hdr(xdr, OP_PUTROOTFH);
+}
+
+static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
+ struct nfs_pgio_res *res)
+{
+ __be32 *p;
+ uint32_t count, eof, recvd;
+ int status;
+
+ status = decode_op_hdr(xdr, OP_READ);
+ if (status)
+ return status;
+ p = xdr_inline_decode(xdr, 8);
+ if (unlikely(!p))
+ goto out_overflow;
+ eof = be32_to_cpup(p++);
+ count = be32_to_cpup(p);
+ recvd = xdr_read_pages(xdr, count);
+ if (count > recvd) {
+ dprintk("NFS: server cheating in read reply: "
+ "count %u > recvd %u\n", count, recvd);
+ count = recvd;
+ eof = 0;
+ }
+ res->eof = eof;
+ res->count = count;
+ return 0;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
+{
+ int status;
+ __be32 verf[2];
+
+ status = decode_op_hdr(xdr, OP_READDIR);
+ if (!status)
+ status = decode_verifier(xdr, readdir->verifier.data);
+ if (unlikely(status))
+ return status;
+ memcpy(verf, readdir->verifier.data, sizeof(verf));
+ dprintk("%s: verifier = %08x:%08x\n",
+ __func__, verf[0], verf[1]);
+ return xdr_read_pages(xdr, xdr->buf->page_len);
+}
+
+static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
+{
+ struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
+ u32 len, recvd;
+ __be32 *p;
+ int status;
+
+ status = decode_op_hdr(xdr, OP_READLINK);
+ if (status)
+ return status;
+
+ /* Convert length of symlink */
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ len = be32_to_cpup(p);
+ if (len >= rcvbuf->page_len || len <= 0) {
+ dprintk("nfs: server returned giant symlink!\n");
+ return -ENAMETOOLONG;
+ }
+ recvd = xdr_read_pages(xdr, len);
+ if (recvd < len) {
+ dprintk("NFS: server cheating in readlink reply: "
+ "count %u > recvd %u\n", len, recvd);
+ return -EIO;
+ }
+ /*
+ * The XDR encode routine has set things up so that
+ * the link text will be copied directly into the
+ * buffer. We just have to do overflow-checking,
+ * and and null-terminate the text (the VFS expects
+ * null-termination).
+ */
+ xdr_terminate_string(rcvbuf, len);
+ return 0;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
+{
+ int status;
+
+ status = decode_op_hdr(xdr, OP_REMOVE);
+ if (status)
+ goto out;
+ status = decode_change_info(xdr, cinfo);
+out:
+ return status;
+}
+
+static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
+ struct nfs4_change_info *new_cinfo)
+{
+ int status;
+
+ status = decode_op_hdr(xdr, OP_RENAME);
+ if (status)
+ goto out;
+ if ((status = decode_change_info(xdr, old_cinfo)))
+ goto out;
+ status = decode_change_info(xdr, new_cinfo);
+out:
+ return status;
+}
+
+static int decode_renew(struct xdr_stream *xdr)
+{
+ return decode_op_hdr(xdr, OP_RENEW);
+}
+
+static int
+decode_restorefh(struct xdr_stream *xdr)
+{
+ return decode_op_hdr(xdr, OP_RESTOREFH);
+}
+
+static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
+ struct nfs_getaclres *res)
+{
+ unsigned int savep;
+ uint32_t attrlen,
+ bitmap[3] = {0};
+ int status;
+ unsigned int pg_offset;
+
+ res->acl_len = 0;
+ if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
+ goto out;
+
+ xdr_enter_page(xdr, xdr->buf->page_len);
+
+ /* Calculate the offset of the page data */
+ pg_offset = xdr->buf->head[0].iov_len;
+
+ if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
+ goto out;
+ if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
+ goto out;
+
+ if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
+ return -EIO;
+ if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
+
+ /* The bitmap (xdr len + bitmaps) and the attr xdr len words
+ * are stored with the acl data to handle the problem of
+ * variable length bitmaps.*/
+ res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
+ res->acl_len = attrlen;
+
+ /* Check for receive buffer overflow */
+ if (res->acl_len > (xdr->nwords << 2) ||
+ res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
+ res->acl_flags |= NFS4_ACL_TRUNC;
+ dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
+ attrlen, xdr->nwords << 2);
+ }
+ } else
+ status = -EOPNOTSUPP;
+
+out:
+ return status;
+}
+
+static int
+decode_savefh(struct xdr_stream *xdr)
+{
+ return decode_op_hdr(xdr, OP_SAVEFH);
+}
+
+static int decode_setattr(struct xdr_stream *xdr)
+{
+ __be32 *p;
+ uint32_t bmlen;
+ int status;
+
+ status = decode_op_hdr(xdr, OP_SETATTR);
+ if (status)
+ return status;
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ bmlen = be32_to_cpup(p);
+ p = xdr_inline_decode(xdr, bmlen << 2);
+ if (likely(p))
+ return 0;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
+{
+ __be32 *p;
+ uint32_t opnum;
+ int32_t nfserr;
+
+ p = xdr_inline_decode(xdr, 8);
+ if (unlikely(!p))
+ goto out_overflow;
+ opnum = be32_to_cpup(p++);
+ if (opnum != OP_SETCLIENTID) {
+ dprintk("nfs: decode_setclientid: Server returned operation"
+ " %d\n", opnum);
+ return -EIO;
+ }
+ nfserr = be32_to_cpup(p);
+ if (nfserr == NFS_OK) {
+ p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
+ if (unlikely(!p))
+ goto out_overflow;
+ p = xdr_decode_hyper(p, &res->clientid);
+ memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
+ } else if (nfserr == NFSERR_CLID_INUSE) {
+ uint32_t len;
+
+ /* skip netid string */
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ len = be32_to_cpup(p);
+ p = xdr_inline_decode(xdr, len);
+ if (unlikely(!p))
+ goto out_overflow;
+
+ /* skip uaddr string */
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ len = be32_to_cpup(p);
+ p = xdr_inline_decode(xdr, len);
+ if (unlikely(!p))
+ goto out_overflow;
+ return -NFSERR_CLID_INUSE;
+ } else
+ return nfs4_stat_to_errno(nfserr);
+
+ return 0;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_setclientid_confirm(struct xdr_stream *xdr)
+{
+ return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
+}
+
+static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
+{
+ __be32 *p;
+ int status;
+
+ status = decode_op_hdr(xdr, OP_WRITE);
+ if (status)
+ return status;
+
+ p = xdr_inline_decode(xdr, 8);
+ if (unlikely(!p))
+ goto out_overflow;
+ res->count = be32_to_cpup(p++);
+ res->verf->committed = be32_to_cpup(p++);
+ return decode_write_verifier(xdr, &res->verf->verifier);
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_delegreturn(struct xdr_stream *xdr)
+{
+ return decode_op_hdr(xdr, OP_DELEGRETURN);
+}
+
+static int decode_secinfo_gss(struct xdr_stream *xdr,
+ struct nfs4_secinfo4 *flavor)
+{
+ u32 oid_len;
+ __be32 *p;
+
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ oid_len = be32_to_cpup(p);
+ if (oid_len > GSS_OID_MAX_LEN)
+ goto out_err;
+
+ p = xdr_inline_decode(xdr, oid_len);
+ if (unlikely(!p))
+ goto out_overflow;
+ memcpy(flavor->flavor_info.oid.data, p, oid_len);
+ flavor->flavor_info.oid.len = oid_len;
+
+ p = xdr_inline_decode(xdr, 8);
+ if (unlikely(!p))
+ goto out_overflow;
+ flavor->flavor_info.qop = be32_to_cpup(p++);
+ flavor->flavor_info.service = be32_to_cpup(p);
+
+ return 0;
+
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+out_err:
+ return -EINVAL;
+}
+
+static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
+{
+ struct nfs4_secinfo4 *sec_flavor;
+ unsigned int i, num_flavors;
+ int status;
+ __be32 *p;
+
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+
+ res->flavors->num_flavors = 0;
+ num_flavors = be32_to_cpup(p);
+
+ for (i = 0; i < num_flavors; i++) {
+ sec_flavor = &res->flavors->flavors[i];
+ if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE)
+ break;
+
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ sec_flavor->flavor = be32_to_cpup(p);
+
+ if (sec_flavor->flavor == RPC_AUTH_GSS) {
+ status = decode_secinfo_gss(xdr, sec_flavor);
+ if (status)
+ goto out;
+ }
+ res->flavors->num_flavors++;
+ }
+
+ status = 0;
+out:
+ return status;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
+{
+ int status = decode_op_hdr(xdr, OP_SECINFO);
+ if (status)
+ return status;
+ return decode_secinfo_common(xdr, res);
+}
+
+#if defined(CONFIG_NFS_V4_1)
+static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
+{
+ int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME);
+ if (status)
+ return status;
+ return decode_secinfo_common(xdr, res);
+}
+
+static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
+{
+ __be32 *p;
+ uint32_t bitmap_words;
+ unsigned int i;
+
+ p = xdr_inline_decode(xdr, 4);
+ bitmap_words = be32_to_cpup(p++);
+ if (bitmap_words > NFS4_OP_MAP_NUM_WORDS)
+ return -EIO;
+ p = xdr_inline_decode(xdr, 4 * bitmap_words);
+ for (i = 0; i < bitmap_words; i++)
+ op_map->u.words[i] = be32_to_cpup(p++);
+
+ return 0;
+}
+
+static int decode_exchange_id(struct xdr_stream *xdr,
+ struct nfs41_exchange_id_res *res)
+{
+ __be32 *p;
+ uint32_t dummy;
+ char *dummy_str;
+ int status;
+ uint32_t impl_id_count;
+
+ status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
+ if (status)
+ return status;
+
+ p = xdr_inline_decode(xdr, 8);
+ if (unlikely(!p))
+ goto out_overflow;
+ xdr_decode_hyper(p, &res->clientid);
+ p = xdr_inline_decode(xdr, 12);
+ if (unlikely(!p))
+ goto out_overflow;
+ res->seqid = be32_to_cpup(p++);
+ res->flags = be32_to_cpup(p++);
+
+ res->state_protect.how = be32_to_cpup(p);
+ switch (res->state_protect.how) {
+ case SP4_NONE:
+ break;
+ case SP4_MACH_CRED:
+ status = decode_op_map(xdr, &res->state_protect.enforce);
+ if (status)
+ return status;
+ status = decode_op_map(xdr, &res->state_protect.allow);
+ if (status)
+ return status;
+ break;
+ default:
+ WARN_ON_ONCE(1);
+ return -EIO;
+ }
+
+ /* server_owner4.so_minor_id */
+ p = xdr_inline_decode(xdr, 8);
+ if (unlikely(!p))
+ goto out_overflow;
+ p = xdr_decode_hyper(p, &res->server_owner->minor_id);
+
+ /* server_owner4.so_major_id */
+ status = decode_opaque_inline(xdr, &dummy, &dummy_str);
+ if (unlikely(status))
+ return status;
+ if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
+ return -EIO;
+ memcpy(res->server_owner->major_id, dummy_str, dummy);
+ res->server_owner->major_id_sz = dummy;
+
+ /* server_scope4 */
+ status = decode_opaque_inline(xdr, &dummy, &dummy_str);
+ if (unlikely(status))
+ return status;
+ if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
+ return -EIO;
+ memcpy(res->server_scope->server_scope, dummy_str, dummy);
+ res->server_scope->server_scope_sz = dummy;
+
+ /* Implementation Id */
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ impl_id_count = be32_to_cpup(p++);
+
+ if (impl_id_count) {
+ /* nii_domain */
+ status = decode_opaque_inline(xdr, &dummy, &dummy_str);
+ if (unlikely(status))
+ return status;
+ if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
+ return -EIO;
+ memcpy(res->impl_id->domain, dummy_str, dummy);
+
+ /* nii_name */
+ status = decode_opaque_inline(xdr, &dummy, &dummy_str);
+ if (unlikely(status))
+ return status;
+ if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
+ return -EIO;
+ memcpy(res->impl_id->name, dummy_str, dummy);
+
+ /* nii_date */
+ p = xdr_inline_decode(xdr, 12);
+ if (unlikely(!p))
+ goto out_overflow;
+ p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
+ res->impl_id->date.nseconds = be32_to_cpup(p);
+
+ /* if there's more than one entry, ignore the rest */
+ }
+ return 0;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_chan_attrs(struct xdr_stream *xdr,
+ struct nfs4_channel_attrs *attrs)
+{
+ __be32 *p;
+ u32 nr_attrs, val;
+
+ p = xdr_inline_decode(xdr, 28);
+ if (unlikely(!p))
+ goto out_overflow;
+ val = be32_to_cpup(p++); /* headerpadsz */
+ if (val)
+ return -EINVAL; /* no support for header padding yet */
+ attrs->max_rqst_sz = be32_to_cpup(p++);
+ attrs->max_resp_sz = be32_to_cpup(p++);
+ attrs->max_resp_sz_cached = be32_to_cpup(p++);
+ attrs->max_ops = be32_to_cpup(p++);
+ attrs->max_reqs = be32_to_cpup(p++);
+ nr_attrs = be32_to_cpup(p);
+ if (unlikely(nr_attrs > 1)) {
+ printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs "
+ "count %u\n", __func__, nr_attrs);
+ return -EINVAL;
+ }
+ if (nr_attrs == 1) {
+ p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
+ if (unlikely(!p))
+ goto out_overflow;
+ }
+ return 0;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
+{
+ return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
+}
+
+static int decode_bind_conn_to_session(struct xdr_stream *xdr,
+ struct nfs41_bind_conn_to_session_res *res)
+{
+ __be32 *p;
+ int status;
+
+ status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);
+ if (!status)
+ status = decode_sessionid(xdr, &res->sessionid);
+ if (unlikely(status))
+ return status;
+
+ /* dir flags, rdma mode bool */
+ p = xdr_inline_decode(xdr, 8);
+ if (unlikely(!p))
+ goto out_overflow;
+
+ res->dir = be32_to_cpup(p++);
+ if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
+ return -EIO;
+ if (be32_to_cpup(p) == 0)
+ res->use_conn_in_rdma_mode = false;
+ else
+ res->use_conn_in_rdma_mode = true;
+
+ return 0;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_create_session(struct xdr_stream *xdr,
+ struct nfs41_create_session_res *res)
+{
+ __be32 *p;
+ int status;
+
+ status = decode_op_hdr(xdr, OP_CREATE_SESSION);
+ if (!status)
+ status = decode_sessionid(xdr, &res->sessionid);
+ if (unlikely(status))
+ return status;
+
+ /* seqid, flags */
+ p = xdr_inline_decode(xdr, 8);
+ if (unlikely(!p))
+ goto out_overflow;
+ res->seqid = be32_to_cpup(p++);
+ res->flags = be32_to_cpup(p);
+
+ /* Channel attributes */
+ status = decode_chan_attrs(xdr, &res->fc_attrs);
+ if (!status)
+ status = decode_chan_attrs(xdr, &res->bc_attrs);
+ return status;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
+{
+ return decode_op_hdr(xdr, OP_DESTROY_SESSION);
+}
+
+static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy)
+{
+ return decode_op_hdr(xdr, OP_DESTROY_CLIENTID);
+}
+
+static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
+{
+ return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
+}
+#endif /* CONFIG_NFS_V4_1 */
+
+static int decode_sequence(struct xdr_stream *xdr,
+ struct nfs4_sequence_res *res,
+ struct rpc_rqst *rqstp)
+{
+#if defined(CONFIG_NFS_V4_1)
+ struct nfs4_session *session;
+ struct nfs4_sessionid id;
+ u32 dummy;
+ int status;
+ __be32 *p;
+
+ if (res->sr_slot == NULL)
+ return 0;
+ if (!res->sr_slot->table->session)
+ return 0;
+
+ status = decode_op_hdr(xdr, OP_SEQUENCE);
+ if (!status)
+ status = decode_sessionid(xdr, &id);
+ if (unlikely(status))
+ goto out_err;
+
+ /*
+ * If the server returns different values for sessionID, slotID or
+ * sequence number, the server is looney tunes.
+ */
+ status = -EREMOTEIO;
+ session = res->sr_slot->table->session;
+
+ if (memcmp(id.data, session->sess_id.data,
+ NFS4_MAX_SESSIONID_LEN)) {
+ dprintk("%s Invalid session id\n", __func__);
+ goto out_err;
+ }
+
+ p = xdr_inline_decode(xdr, 20);
+ if (unlikely(!p))
+ goto out_overflow;
+
+ /* seqid */
+ dummy = be32_to_cpup(p++);
+ if (dummy != res->sr_slot->seq_nr) {
+ dprintk("%s Invalid sequence number\n", __func__);
+ goto out_err;
+ }
+ /* slot id */
+ dummy = be32_to_cpup(p++);
+ if (dummy != res->sr_slot->slot_nr) {
+ dprintk("%s Invalid slot id\n", __func__);
+ goto out_err;
+ }
+ /* highest slot id */
+ res->sr_highest_slotid = be32_to_cpup(p++);
+ /* target highest slot id */
+ res->sr_target_highest_slotid = be32_to_cpup(p++);
+ /* result flags */
+ res->sr_status_flags = be32_to_cpup(p);
+ status = 0;
+out_err:
+ res->sr_status = status;
+ return status;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ status = -EIO;
+ goto out_err;
+#else /* CONFIG_NFS_V4_1 */
+ return 0;
+#endif /* CONFIG_NFS_V4_1 */
+}
+
+#if defined(CONFIG_NFS_V4_1)
+static int decode_getdeviceinfo(struct xdr_stream *xdr,
+ struct nfs4_getdeviceinfo_res *res)
+{
+ struct pnfs_device *pdev = res->pdev;
+ __be32 *p;
+ uint32_t len, type;
+ int status;
+
+ status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
+ if (status) {
+ if (status == -ETOOSMALL) {
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ pdev->mincount = be32_to_cpup(p);
+ dprintk("%s: Min count too small. mincnt = %u\n",
+ __func__, pdev->mincount);
+ }
+ return status;
+ }
+
+ p = xdr_inline_decode(xdr, 8);
+ if (unlikely(!p))
+ goto out_overflow;
+ type = be32_to_cpup(p++);
+ if (type != pdev->layout_type) {
+ dprintk("%s: layout mismatch req: %u pdev: %u\n",
+ __func__, pdev->layout_type, type);
+ return -EINVAL;
+ }
+ /*
+ * Get the length of the opaque device_addr4. xdr_read_pages places
+ * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
+ * and places the remaining xdr data in xdr_buf->tail
+ */
+ pdev->mincount = be32_to_cpup(p);
+ if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
+ goto out_overflow;
+
+ /* Parse notification bitmap, verifying that it is zero. */
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ len = be32_to_cpup(p);
+ if (len) {
+ uint32_t i;
+
+ p = xdr_inline_decode(xdr, 4 * len);
+ if (unlikely(!p))
+ goto out_overflow;
+
+ res->notification = be32_to_cpup(p++);
+ for (i = 1; i < len; i++) {
+ if (be32_to_cpup(p++)) {
+ dprintk("%s: unsupported notification\n",
+ __func__);
+ return -EIO;
+ }
+ }
+ }
+ return 0;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
+ struct nfs4_layoutget_res *res)
+{
+ __be32 *p;
+ int status;
+ u32 layout_count;
+ u32 recvd;
+
+ status = decode_op_hdr(xdr, OP_LAYOUTGET);
+ if (status)
+ return status;
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ res->return_on_close = be32_to_cpup(p);
+ decode_stateid(xdr, &res->stateid);
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ layout_count = be32_to_cpup(p);
+ if (!layout_count) {
+ dprintk("%s: server responded with empty layout array\n",
+ __func__);
+ return -EINVAL;
+ }
+
+ p = xdr_inline_decode(xdr, 28);
+ if (unlikely(!p))
+ goto out_overflow;
+ p = xdr_decode_hyper(p, &res->range.offset);
+ p = xdr_decode_hyper(p, &res->range.length);
+ res->range.iomode = be32_to_cpup(p++);
+ res->type = be32_to_cpup(p++);
+ res->layoutp->len = be32_to_cpup(p);
+
+ dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
+ __func__,
+ (unsigned long)res->range.offset,
+ (unsigned long)res->range.length,
+ res->range.iomode,
+ res->type,
+ res->layoutp->len);
+
+ recvd = xdr_read_pages(xdr, res->layoutp->len);
+ if (res->layoutp->len > recvd) {
+ dprintk("NFS: server cheating in layoutget reply: "
+ "layout len %u > recvd %u\n",
+ res->layoutp->len, recvd);
+ return -EINVAL;
+ }
+
+ if (layout_count > 1) {
+ /* We only handle a length one array at the moment. Any
+ * further entries are just ignored. Note that this means
+ * the client may see a response that is less than the
+ * minimum it requested.
+ */
+ dprintk("%s: server responded with %d layouts, dropping tail\n",
+ __func__, layout_count);
+ }
+
+ return 0;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_layoutreturn(struct xdr_stream *xdr,
+ struct nfs4_layoutreturn_res *res)
+{
+ __be32 *p;
+ int status;
+
+ status = decode_op_hdr(xdr, OP_LAYOUTRETURN);
+ if (status)
+ return status;
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ res->lrs_present = be32_to_cpup(p);
+ if (res->lrs_present)
+ status = decode_stateid(xdr, &res->stateid);
+ return status;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_layoutcommit(struct xdr_stream *xdr,
+ struct rpc_rqst *req,
+ struct nfs4_layoutcommit_res *res)
+{
+ __be32 *p;
+ __u32 sizechanged;
+ int status;
+
+ status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
+ res->status = status;
+ if (status)
+ return status;
+
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ sizechanged = be32_to_cpup(p);
+
+ if (sizechanged) {
+ /* throw away new size */
+ p = xdr_inline_decode(xdr, 8);
+ if (unlikely(!p))
+ goto out_overflow;
+ }
+ return 0;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_test_stateid(struct xdr_stream *xdr,
+ struct nfs41_test_stateid_res *res)
+{
+ __be32 *p;
+ int status;
+ int num_res;
+
+ status = decode_op_hdr(xdr, OP_TEST_STATEID);
+ if (status)
+ return status;
+
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ num_res = be32_to_cpup(p++);
+ if (num_res != 1)
+ goto out;
+
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ res->status = be32_to_cpup(p++);
+
+ return status;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+out:
+ return -EIO;
+}
+
+static int decode_free_stateid(struct xdr_stream *xdr,
+ struct nfs41_free_stateid_res *res)
+{
+ res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
+ return res->status;
+}
+#endif /* CONFIG_NFS_V4_1 */
+
+/*
+ * END OF "GENERIC" DECODE ROUTINES.
+ */
+
+/*
+ * Decode OPEN_DOWNGRADE response
+ */
+static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
+ struct xdr_stream *xdr,
+ struct nfs_closeres *res)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ status = decode_compound_hdr(xdr, &hdr);
+ if (status)
+ goto out;
+ status = decode_sequence(xdr, &res->seq_res, rqstp);
+ if (status)
+ goto out;
+ status = decode_putfh(xdr);
+ if (status)
+ goto out;
+ status = decode_open_downgrade(xdr, res);
+ if (status != 0)
+ goto out;
+ decode_getfattr(xdr, res->fattr, res->server);
+out:
+ return status;
+}
+
+/*
+ * Decode ACCESS response
+ */
+static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
+ struct nfs4_accessres *res)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ status = decode_compound_hdr(xdr, &hdr);
+ if (status)
+ goto out;
+ status = decode_sequence(xdr, &res->seq_res, rqstp);
+ if (status)
+ goto out;
+ status = decode_putfh(xdr);
+ if (status != 0)
+ goto out;
+ status = decode_access(xdr, &res->supported, &res->access);
+ if (status != 0)
+ goto out;
+ decode_getfattr(xdr, res->fattr, res->server);
+out:
+ return status;
+}
+
+/*
+ * Decode LOOKUP response
+ */
+static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
+ struct nfs4_lookup_res *res)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ status = decode_compound_hdr(xdr, &hdr);
+ if (status)
+ goto out;
+ status = decode_sequence(xdr, &res->seq_res, rqstp);
+ if (status)
+ goto out;
+ status = decode_putfh(xdr);
+ if (status)
+ goto out;
+ status = decode_lookup(xdr);
+ if (status)
+ goto out;
+ status = decode_getfh(xdr, res->fh);
+ if (status)
+ goto out;
+ status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
+out:
+ return status;
+}
+
+/*
+ * Decode LOOKUP_ROOT response
+ */
+static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
+ struct xdr_stream *xdr,
+ struct nfs4_lookup_res *res)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ status = decode_compound_hdr(xdr, &hdr);
+ if (status)
+ goto out;
+ status = decode_sequence(xdr, &res->seq_res, rqstp);
+ if (status)
+ goto out;
+ status = decode_putrootfh(xdr);
+ if (status)
+ goto out;
+ status = decode_getfh(xdr, res->fh);
+ if (status == 0)
+ status = decode_getfattr_label(xdr, res->fattr,
+ res->label, res->server);
+out:
+ return status;
+}
+
+/*
+ * Decode REMOVE response
+ */
+static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
+ struct nfs_removeres *res)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ status = decode_compound_hdr(xdr, &hdr);
+ if (status)
+ goto out;
+ status = decode_sequence(xdr, &res->seq_res, rqstp);
+ if (status)
+ goto out;
+ status = decode_putfh(xdr);
+ if (status)
+ goto out;
+ status = decode_remove(xdr, &res->cinfo);
+out:
+ return status;
+}
+
+/*
+ * Decode RENAME response
+ */
+static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
+ struct nfs_renameres *res)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ status = decode_compound_hdr(xdr, &hdr);
+ if (status)
+ goto out;
+ status = decode_sequence(xdr, &res->seq_res, rqstp);
+ if (status)
+ goto out;
+ status = decode_putfh(xdr);
+ if (status)
+ goto out;
+ status = decode_savefh(xdr);
+ if (status)
+ goto out;
+ status = decode_putfh(xdr);
+ if (status)
+ goto out;
+ status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
+out:
+ return status;
+}
+
+/*
+ * Decode LINK response
+ */
+static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
+ struct nfs4_link_res *res)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ status = decode_compound_hdr(xdr, &hdr);
+ if (status)
+ goto out;
+ status = decode_sequence(xdr, &res->seq_res, rqstp);
+ if (status)
+ goto out;
+ status = decode_putfh(xdr);
+ if (status)
+ goto out;
+ status = decode_savefh(xdr);
+ if (status)
+ goto out;
+ status = decode_putfh(xdr);
+ if (status)
+ goto out;
+ status = decode_link(xdr, &res->cinfo);
+ if (status)
+ goto out;
+ /*
+ * Note order: OP_LINK leaves the directory as the current
+ * filehandle.
+ */
+ status = decode_restorefh(xdr);
+ if (status)
+ goto out;
+ decode_getfattr_label(xdr, res->fattr, res->label, res->server);
+out:
+ return status;
+}
+
+/*
+ * Decode CREATE response
+ */
+static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
+ struct nfs4_create_res *res)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ status = decode_compound_hdr(xdr, &hdr);
+ if (status)
+ goto out;
+ status = decode_sequence(xdr, &res->seq_res, rqstp);
+ if (status)
+ goto out;
+ status = decode_putfh(xdr);
+ if (status)
+ goto out;
+ status = decode_create(xdr, &res->dir_cinfo);
+ if (status)
+ goto out;
+ status = decode_getfh(xdr, res->fh);
+ if (status)
+ goto out;
+ decode_getfattr_label(xdr, res->fattr, res->label, res->server);
+out:
+ return status;
+}
+
+/*
+ * Decode SYMLINK response
+ */
+static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
+ struct nfs4_create_res *res)
+{
+ return nfs4_xdr_dec_create(rqstp, xdr, res);
+}
+
+/*
+ * Decode GETATTR response
+ */
+static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
+ struct nfs4_getattr_res *res)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ status = decode_compound_hdr(xdr, &hdr);
+ if (status)
+ goto out;
+ status = decode_sequence(xdr, &res->seq_res, rqstp);
+ if (status)
+ goto out;
+ status = decode_putfh(xdr);
+ if (status)
+ goto out;
+ status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
+out:
+ return status;
+}
+
+/*
+ * Encode an SETACL request
+ */
+static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
+ struct nfs_setaclargs *args)
+{
+ struct compound_hdr hdr = {
+ .minorversion = nfs4_xdr_minorversion(&args->seq_args),
+ };
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_sequence(xdr, &args->seq_args, &hdr);
+ encode_putfh(xdr, args->fh, &hdr);
+ encode_setacl(xdr, args, &hdr);
+ encode_nops(&hdr);
+}
+
+/*
+ * Decode SETACL response
+ */
+static int
+nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
+ struct nfs_setaclres *res)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ status = decode_compound_hdr(xdr, &hdr);
+ if (status)
+ goto out;
+ status = decode_sequence(xdr, &res->seq_res, rqstp);
+ if (status)
+ goto out;
+ status = decode_putfh(xdr);
+ if (status)
+ goto out;
+ status = decode_setattr(xdr);
+out:
+ return status;
+}
+
+/*
+ * Decode GETACL response
+ */
+static int
+nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
+ struct nfs_getaclres *res)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ if (res->acl_scratch != NULL) {
+ void *p = page_address(res->acl_scratch);
+ xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
+ }
+ status = decode_compound_hdr(xdr, &hdr);
+ if (status)
+ goto out;
+ status = decode_sequence(xdr, &res->seq_res, rqstp);
+ if (status)
+ goto out;
+ status = decode_putfh(xdr);
+ if (status)
+ goto out;
+ status = decode_getacl(xdr, rqstp, res);
+
+out:
+ return status;
+}
+
+/*
+ * Decode CLOSE response
+ */
+static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
+ struct nfs_closeres *res)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ status = decode_compound_hdr(xdr, &hdr);
+ if (status)
+ goto out;
+ status = decode_sequence(xdr, &res->seq_res, rqstp);
+ if (status)
+ goto out;
+ status = decode_putfh(xdr);
+ if (status)
+ goto out;
+ status = decode_close(xdr, res);
+ if (status != 0)
+ goto out;
+ /*
+ * Note: Server may do delete on close for this file
+ * in which case the getattr call will fail with
+ * an ESTALE error. Shouldn't be a problem,
+ * though, since fattr->valid will remain unset.
+ */
+ decode_getfattr(xdr, res->fattr, res->server);
+out:
+ return status;
+}
+
+/*
+ * Decode OPEN response
+ */
+static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
+ struct nfs_openres *res)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ status = decode_compound_hdr(xdr, &hdr);
+ if (status)
+ goto out;
+ status = decode_sequence(xdr, &res->seq_res, rqstp);
+ if (status)
+ goto out;
+ status = decode_putfh(xdr);
+ if (status)
+ goto out;
+ status = decode_open(xdr, res);
+ if (status)
+ goto out;
+ status = decode_getfh(xdr, &res->fh);
+ if (status)
+ goto out;
+ if (res->access_request)
+ decode_access(xdr, &res->access_supported, &res->access_result);
+ decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
+out:
+ return status;
+}
+
+/*
+ * Decode OPEN_CONFIRM response
+ */
+static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
+ struct xdr_stream *xdr,
+ struct nfs_open_confirmres *res)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ status = decode_compound_hdr(xdr, &hdr);
+ if (status)
+ goto out;
+ status = decode_putfh(xdr);
+ if (status)
+ goto out;
+ status = decode_open_confirm(xdr, res);
+out:
+ return status;
+}
+
+/*
+ * Decode OPEN response
+ */
+static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
+ struct xdr_stream *xdr,
+ struct nfs_openres *res)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ status = decode_compound_hdr(xdr, &hdr);
+ if (status)
+ goto out;
+ status = decode_sequence(xdr, &res->seq_res, rqstp);
+ if (status)
+ goto out;
+ status = decode_putfh(xdr);
+ if (status)
+ goto out;
+ status = decode_open(xdr, res);
+ if (status)
+ goto out;
+ if (res->access_request)
+ decode_access(xdr, &res->access_supported, &res->access_result);
+ decode_getfattr(xdr, res->f_attr, res->server);
+out:
+ return status;
+}
+
+/*
+ * Decode SETATTR response
+ */
+static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
+ struct xdr_stream *xdr,
+ struct nfs_setattrres *res)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ status = decode_compound_hdr(xdr, &hdr);
+ if (status)
+ goto out;
+ status = decode_sequence(xdr, &res->seq_res, rqstp);
+ if (status)
+ goto out;
+ status = decode_putfh(xdr);
+ if (status)
+ goto out;
+ status = decode_setattr(xdr);
+ if (status)
+ goto out;
+ decode_getfattr_label(xdr, res->fattr, res->label, res->server);
+out:
+ return status;
+}
+
+/*
+ * Decode LOCK response
+ */
+static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
+ struct nfs_lock_res *res)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ status = decode_compound_hdr(xdr, &hdr);
+ if (status)
+ goto out;
+ status = decode_sequence(xdr, &res->seq_res, rqstp);
+ if (status)
+ goto out;
+ status = decode_putfh(xdr);
+ if (status)
+ goto out;
+ status = decode_lock(xdr, res);
+out:
+ return status;
+}
+
+/*
+ * Decode LOCKT response
+ */
+static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
+ struct nfs_lockt_res *res)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ status = decode_compound_hdr(xdr, &hdr);
+ if (status)
+ goto out;
+ status = decode_sequence(xdr, &res->seq_res, rqstp);
+ if (status)
+ goto out;
+ status = decode_putfh(xdr);
+ if (status)
+ goto out;
+ status = decode_lockt(xdr, res);
+out:
+ return status;
+}
+
+/*
+ * Decode LOCKU response
+ */
+static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
+ struct nfs_locku_res *res)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ status = decode_compound_hdr(xdr, &hdr);
+ if (status)
+ goto out;
+ status = decode_sequence(xdr, &res->seq_res, rqstp);
+ if (status)
+ goto out;
+ status = decode_putfh(xdr);
+ if (status)
+ goto out;
+ status = decode_locku(xdr, res);
+out:
+ return status;
+}
+
+static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
+ struct xdr_stream *xdr, void *dummy)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ status = decode_compound_hdr(xdr, &hdr);
+ if (!status)
+ status = decode_release_lockowner(xdr);
+ return status;
+}
+
+/*
+ * Decode READLINK response
+ */
+static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
+ struct xdr_stream *xdr,
+ struct nfs4_readlink_res *res)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ status = decode_compound_hdr(xdr, &hdr);
+ if (status)
+ goto out;
+ status = decode_sequence(xdr, &res->seq_res, rqstp);
+ if (status)
+ goto out;
+ status = decode_putfh(xdr);
+ if (status)
+ goto out;
+ status = decode_readlink(xdr, rqstp);
+out:
+ return status;
+}
+
+/*
+ * Decode READDIR response
+ */
+static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
+ struct nfs4_readdir_res *res)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ status = decode_compound_hdr(xdr, &hdr);
+ if (status)
+ goto out;
+ status = decode_sequence(xdr, &res->seq_res, rqstp);
+ if (status)
+ goto out;
+ status = decode_putfh(xdr);
+ if (status)
+ goto out;
+ status = decode_readdir(xdr, rqstp, res);
+out:
+ return status;
+}
+
+/*
+ * Decode Read response
+ */
+static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
+ struct nfs_pgio_res *res)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ status = decode_compound_hdr(xdr, &hdr);
+ res->op_status = hdr.status;
+ if (status)
+ goto out;
+ status = decode_sequence(xdr, &res->seq_res, rqstp);
+ if (status)
+ goto out;
+ status = decode_putfh(xdr);
+ if (status)
+ goto out;
+ status = decode_read(xdr, rqstp, res);
+ if (!status)
+ status = res->count;
+out:
+ return status;
+}
+
+/*
+ * Decode WRITE response
+ */
+static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
+ struct nfs_pgio_res *res)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ status = decode_compound_hdr(xdr, &hdr);
+ res->op_status = hdr.status;
+ if (status)
+ goto out;
+ status = decode_sequence(xdr, &res->seq_res, rqstp);
+ if (status)
+ goto out;
+ status = decode_putfh(xdr);
+ if (status)
+ goto out;
+ status = decode_write(xdr, res);
+ if (status)
+ goto out;
+ if (res->fattr)
+ decode_getfattr(xdr, res->fattr, res->server);
+ if (!status)
+ status = res->count;
+out:
+ return status;
+}
+
+/*
+ * Decode COMMIT response
+ */
+static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
+ struct nfs_commitres *res)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ status = decode_compound_hdr(xdr, &hdr);
+ res->op_status = hdr.status;
+ if (status)
+ goto out;
+ status = decode_sequence(xdr, &res->seq_res, rqstp);
+ if (status)
+ goto out;
+ status = decode_putfh(xdr);
+ if (status)
+ goto out;
+ status = decode_commit(xdr, res);
+out:
+ return status;
+}
+
+/*
+ * Decode FSINFO response
+ */
+static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
+ struct nfs4_fsinfo_res *res)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ status = decode_compound_hdr(xdr, &hdr);
+ if (!status)
+ status = decode_sequence(xdr, &res->seq_res, req);
+ if (!status)
+ status = decode_putfh(xdr);
+ if (!status)
+ status = decode_fsinfo(xdr, res->fsinfo);
+ return status;
+}
+
+/*
+ * Decode PATHCONF response
+ */
+static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
+ struct nfs4_pathconf_res *res)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ status = decode_compound_hdr(xdr, &hdr);
+ if (!status)
+ status = decode_sequence(xdr, &res->seq_res, req);
+ if (!status)
+ status = decode_putfh(xdr);
+ if (!status)
+ status = decode_pathconf(xdr, res->pathconf);
+ return status;
+}
+
+/*
+ * Decode STATFS response
+ */
+static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
+ struct nfs4_statfs_res *res)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ status = decode_compound_hdr(xdr, &hdr);
+ if (!status)
+ status = decode_sequence(xdr, &res->seq_res, req);
+ if (!status)
+ status = decode_putfh(xdr);
+ if (!status)
+ status = decode_statfs(xdr, res->fsstat);
+ return status;
+}
+
+/*
+ * Decode GETATTR_BITMAP response
+ */
+static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
+ struct xdr_stream *xdr,
+ struct nfs4_server_caps_res *res)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ status = decode_compound_hdr(xdr, &hdr);
+ if (status)
+ goto out;
+ status = decode_sequence(xdr, &res->seq_res, req);
+ if (status)
+ goto out;
+ status = decode_putfh(xdr);
+ if (status)
+ goto out;
+ status = decode_server_caps(xdr, res);
+out:
+ return status;
+}
+
+/*
+ * Decode RENEW response
+ */
+static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
+ void *__unused)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ status = decode_compound_hdr(xdr, &hdr);
+ if (!status)
+ status = decode_renew(xdr);
+ return status;
+}
+
+/*
+ * Decode SETCLIENTID response
+ */
+static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
+ struct xdr_stream *xdr,
+ struct nfs4_setclientid_res *res)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ status = decode_compound_hdr(xdr, &hdr);
+ if (!status)
+ status = decode_setclientid(xdr, res);
+ return status;
+}
+
+/*
+ * Decode SETCLIENTID_CONFIRM response
+ */
+static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
+ struct xdr_stream *xdr)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ status = decode_compound_hdr(xdr, &hdr);
+ if (!status)
+ status = decode_setclientid_confirm(xdr);
+ return status;
+}
+
+/*
+ * Decode DELEGRETURN response
+ */
+static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
+ struct xdr_stream *xdr,
+ struct nfs4_delegreturnres *res)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ status = decode_compound_hdr(xdr, &hdr);
+ if (status)
+ goto out;
+ status = decode_sequence(xdr, &res->seq_res, rqstp);
+ if (status)
+ goto out;
+ status = decode_putfh(xdr);
+ if (status != 0)
+ goto out;
+ status = decode_getfattr(xdr, res->fattr, res->server);
+ if (status != 0)
+ goto out;
+ status = decode_delegreturn(xdr);
+out:
+ return status;
+}
+
+/*
+ * Decode FS_LOCATIONS response
+ */
+static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
+ struct xdr_stream *xdr,
+ struct nfs4_fs_locations_res *res)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ status = decode_compound_hdr(xdr, &hdr);
+ if (status)
+ goto out;
+ status = decode_sequence(xdr, &res->seq_res, req);
+ if (status)
+ goto out;
+ status = decode_putfh(xdr);
+ if (status)
+ goto out;
+ if (res->migration) {
+ xdr_enter_page(xdr, PAGE_SIZE);
+ status = decode_getfattr_generic(xdr,
+ &res->fs_locations->fattr,
+ NULL, res->fs_locations,
+ NULL, res->fs_locations->server);
+ if (status)
+ goto out;
+ if (res->renew)
+ status = decode_renew(xdr);
+ } else {
+ status = decode_lookup(xdr);
+ if (status)
+ goto out;
+ xdr_enter_page(xdr, PAGE_SIZE);
+ status = decode_getfattr_generic(xdr,
+ &res->fs_locations->fattr,
+ NULL, res->fs_locations,
+ NULL, res->fs_locations->server);
+ }
+out:
+ return status;
+}
+
+/*
+ * Decode SECINFO response
+ */
+static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
+ struct xdr_stream *xdr,
+ struct nfs4_secinfo_res *res)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ status = decode_compound_hdr(xdr, &hdr);
+ if (status)
+ goto out;
+ status = decode_sequence(xdr, &res->seq_res, rqstp);
+ if (status)
+ goto out;
+ status = decode_putfh(xdr);
+ if (status)
+ goto out;
+ status = decode_secinfo(xdr, res);
+out:
+ return status;
+}
+
+/*
+ * Decode FSID_PRESENT response
+ */
+static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp,
+ struct xdr_stream *xdr,
+ struct nfs4_fsid_present_res *res)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ status = decode_compound_hdr(xdr, &hdr);
+ if (status)
+ goto out;
+ status = decode_sequence(xdr, &res->seq_res, rqstp);
+ if (status)
+ goto out;
+ status = decode_putfh(xdr);
+ if (status)
+ goto out;
+ status = decode_getfh(xdr, res->fh);
+ if (status)
+ goto out;
+ if (res->renew)
+ status = decode_renew(xdr);
+out:
+ return status;
+}
+
+#if defined(CONFIG_NFS_V4_1)
+/*
+ * Decode BIND_CONN_TO_SESSION response
+ */
+static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp,
+ struct xdr_stream *xdr,
+ void *res)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ status = decode_compound_hdr(xdr, &hdr);
+ if (!status)
+ status = decode_bind_conn_to_session(xdr, res);
+ return status;
+}
+
+/*
+ * Decode EXCHANGE_ID response
+ */
+static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
+ struct xdr_stream *xdr,
+ void *res)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ status = decode_compound_hdr(xdr, &hdr);
+ if (!status)
+ status = decode_exchange_id(xdr, res);
+ return status;
+}
+
+/*
+ * Decode CREATE_SESSION response
+ */
+static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
+ struct xdr_stream *xdr,
+ struct nfs41_create_session_res *res)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ status = decode_compound_hdr(xdr, &hdr);
+ if (!status)
+ status = decode_create_session(xdr, res);
+ return status;
+}
+
+/*
+ * Decode DESTROY_SESSION response
+ */
+static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
+ struct xdr_stream *xdr,
+ void *res)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ status = decode_compound_hdr(xdr, &hdr);
+ if (!status)
+ status = decode_destroy_session(xdr, res);
+ return status;
+}
+
+/*
+ * Decode DESTROY_CLIENTID response
+ */
+static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp,
+ struct xdr_stream *xdr,
+ void *res)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ status = decode_compound_hdr(xdr, &hdr);
+ if (!status)
+ status = decode_destroy_clientid(xdr, res);
+ return status;
+}
+
+/*
+ * Decode SEQUENCE response
+ */
+static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
+ struct xdr_stream *xdr,
+ struct nfs4_sequence_res *res)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ status = decode_compound_hdr(xdr, &hdr);
+ if (!status)
+ status = decode_sequence(xdr, res, rqstp);
+ return status;
+}
+
+/*
+ * Decode GET_LEASE_TIME response
+ */
+static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
+ struct xdr_stream *xdr,
+ struct nfs4_get_lease_time_res *res)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ status = decode_compound_hdr(xdr, &hdr);
+ if (!status)
+ status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
+ if (!status)
+ status = decode_putrootfh(xdr);
+ if (!status)
+ status = decode_fsinfo(xdr, res->lr_fsinfo);
+ return status;
+}
+
+/*
+ * Decode RECLAIM_COMPLETE response
+ */
+static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
+ struct xdr_stream *xdr,
+ struct nfs41_reclaim_complete_res *res)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ status = decode_compound_hdr(xdr, &hdr);
+ if (!status)
+ status = decode_sequence(xdr, &res->seq_res, rqstp);
+ if (!status)
+ status = decode_reclaim_complete(xdr, NULL);
+ return status;
+}
+
+/*
+ * Decode GETDEVINFO response
+ */
+static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
+ struct xdr_stream *xdr,
+ struct nfs4_getdeviceinfo_res *res)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ status = decode_compound_hdr(xdr, &hdr);
+ if (status != 0)
+ goto out;
+ status = decode_sequence(xdr, &res->seq_res, rqstp);
+ if (status != 0)
+ goto out;
+ status = decode_getdeviceinfo(xdr, res);
+out:
+ return status;
+}
+
+/*
+ * Decode LAYOUTGET response
+ */
+static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
+ struct xdr_stream *xdr,
+ struct nfs4_layoutget_res *res)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ status = decode_compound_hdr(xdr, &hdr);
+ if (status)
+ goto out;
+ status = decode_sequence(xdr, &res->seq_res, rqstp);
+ if (status)
+ goto out;
+ status = decode_putfh(xdr);
+ if (status)
+ goto out;
+ status = decode_layoutget(xdr, rqstp, res);
+out:
+ return status;
+}
+
+/*
+ * Decode LAYOUTRETURN response
+ */
+static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp,
+ struct xdr_stream *xdr,
+ struct nfs4_layoutreturn_res *res)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ status = decode_compound_hdr(xdr, &hdr);
+ if (status)
+ goto out;
+ status = decode_sequence(xdr, &res->seq_res, rqstp);
+ if (status)
+ goto out;
+ status = decode_putfh(xdr);
+ if (status)
+ goto out;
+ status = decode_layoutreturn(xdr, res);
+out:
+ return status;
+}
+
+/*
+ * Decode LAYOUTCOMMIT response
+ */
+static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
+ struct xdr_stream *xdr,
+ struct nfs4_layoutcommit_res *res)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ status = decode_compound_hdr(xdr, &hdr);
+ if (status)
+ goto out;
+ status = decode_sequence(xdr, &res->seq_res, rqstp);
+ if (status)
+ goto out;
+ status = decode_putfh(xdr);
+ if (status)
+ goto out;
+ status = decode_layoutcommit(xdr, rqstp, res);
+ if (status)
+ goto out;
+ decode_getfattr(xdr, res->fattr, res->server);
+out:
+ return status;
+}
+
+/*
+ * Decode SECINFO_NO_NAME response
+ */
+static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
+ struct xdr_stream *xdr,
+ struct nfs4_secinfo_res *res)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ status = decode_compound_hdr(xdr, &hdr);
+ if (status)
+ goto out;
+ status = decode_sequence(xdr, &res->seq_res, rqstp);
+ if (status)
+ goto out;
+ status = decode_putrootfh(xdr);
+ if (status)
+ goto out;
+ status = decode_secinfo_no_name(xdr, res);
+out:
+ return status;
+}
+
+/*
+ * Decode TEST_STATEID response
+ */
+static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
+ struct xdr_stream *xdr,
+ struct nfs41_test_stateid_res *res)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ status = decode_compound_hdr(xdr, &hdr);
+ if (status)
+ goto out;
+ status = decode_sequence(xdr, &res->seq_res, rqstp);
+ if (status)
+ goto out;
+ status = decode_test_stateid(xdr, res);
+out:
+ return status;
+}
+
+/*
+ * Decode FREE_STATEID response
+ */
+static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp,
+ struct xdr_stream *xdr,
+ struct nfs41_free_stateid_res *res)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ status = decode_compound_hdr(xdr, &hdr);
+ if (status)
+ goto out;
+ status = decode_sequence(xdr, &res->seq_res, rqstp);
+ if (status)
+ goto out;
+ status = decode_free_stateid(xdr, res);
+out:
+ return status;
+}
+#endif /* CONFIG_NFS_V4_1 */
+
+/**
+ * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
+ * the local page cache.
+ * @xdr: XDR stream where entry resides
+ * @entry: buffer to fill in with entry data
+ * @plus: boolean indicating whether this should be a readdirplus entry
+ *
+ * Returns zero if successful, otherwise a negative errno value is
+ * returned.
+ *
+ * This function is not invoked during READDIR reply decoding, but
+ * rather whenever an application invokes the getdents(2) system call
+ * on a directory already in our cache.
+ */
+int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
+ int plus)
+{
+ unsigned int savep;
+ uint32_t bitmap[3] = {0};
+ uint32_t len;
+ __be32 *p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ if (*p == xdr_zero) {
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ if (*p == xdr_zero)
+ return -EAGAIN;
+ entry->eof = 1;
+ return -EBADCOOKIE;
+ }
+
+ p = xdr_inline_decode(xdr, 12);
+ if (unlikely(!p))
+ goto out_overflow;
+ entry->prev_cookie = entry->cookie;
+ p = xdr_decode_hyper(p, &entry->cookie);
+ entry->len = be32_to_cpup(p);
+
+ p = xdr_inline_decode(xdr, entry->len);
+ if (unlikely(!p))
+ goto out_overflow;
+ entry->name = (const char *) p;
+
+ /*
+ * In case the server doesn't return an inode number,
+ * we fake one here. (We don't use inode number 0,
+ * since glibc seems to choke on it...)
+ */
+ entry->ino = 1;
+ entry->fattr->valid = 0;
+
+ if (decode_attr_bitmap(xdr, bitmap) < 0)
+ goto out_overflow;
+
+ if (decode_attr_length(xdr, &len, &savep) < 0)
+ goto out_overflow;
+
+ if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
+ NULL, entry->label, entry->server) < 0)
+ goto out_overflow;
+ if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
+ entry->ino = entry->fattr->mounted_on_fileid;
+ else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
+ entry->ino = entry->fattr->fileid;
+
+ entry->d_type = DT_UNKNOWN;
+ if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
+ entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
+
+ return 0;
+
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EAGAIN;
+}
+
+/*
+ * We need to translate between nfs status return values and
+ * the local errno values which may not be the same.
+ */
+static struct {
+ int stat;
+ int errno;
+} nfs_errtbl[] = {
+ { NFS4_OK, 0 },
+ { NFS4ERR_PERM, -EPERM },
+ { NFS4ERR_NOENT, -ENOENT },
+ { NFS4ERR_IO, -errno_NFSERR_IO},
+ { NFS4ERR_NXIO, -ENXIO },
+ { NFS4ERR_ACCESS, -EACCES },
+ { NFS4ERR_EXIST, -EEXIST },
+ { NFS4ERR_XDEV, -EXDEV },
+ { NFS4ERR_NOTDIR, -ENOTDIR },
+ { NFS4ERR_ISDIR, -EISDIR },
+ { NFS4ERR_INVAL, -EINVAL },
+ { NFS4ERR_FBIG, -EFBIG },
+ { NFS4ERR_NOSPC, -ENOSPC },
+ { NFS4ERR_ROFS, -EROFS },
+ { NFS4ERR_MLINK, -EMLINK },
+ { NFS4ERR_NAMETOOLONG, -ENAMETOOLONG },
+ { NFS4ERR_NOTEMPTY, -ENOTEMPTY },
+ { NFS4ERR_DQUOT, -EDQUOT },
+ { NFS4ERR_STALE, -ESTALE },
+ { NFS4ERR_BADHANDLE, -EBADHANDLE },
+ { NFS4ERR_BAD_COOKIE, -EBADCOOKIE },
+ { NFS4ERR_NOTSUPP, -ENOTSUPP },
+ { NFS4ERR_TOOSMALL, -ETOOSMALL },
+ { NFS4ERR_SERVERFAULT, -EREMOTEIO },
+ { NFS4ERR_BADTYPE, -EBADTYPE },
+ { NFS4ERR_LOCKED, -EAGAIN },
+ { NFS4ERR_SYMLINK, -ELOOP },
+ { NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP },
+ { NFS4ERR_DEADLOCK, -EDEADLK },
+ { -1, -EIO }
+};
+
+/*
+ * Convert an NFS error code to a local one.
+ * This one is used jointly by NFSv2 and NFSv3.
+ */
+static int
+nfs4_stat_to_errno(int stat)
+{
+ int i;
+ for (i = 0; nfs_errtbl[i].stat != -1; i++) {
+ if (nfs_errtbl[i].stat == stat)
+ return nfs_errtbl[i].errno;
+ }
+ if (stat <= 10000 || stat > 10100) {
+ /* The server is looney tunes. */
+ return -EREMOTEIO;
+ }
+ /* If we cannot translate the error, the recovery routines should
+ * handle it.
+ * Note: remaining NFSv4 error codes have values > 10000, so should
+ * not conflict with native Linux error codes.
+ */
+ return -stat;
+}
+
+#ifdef CONFIG_NFS_V4_2
+#include "nfs42xdr.c"
+#endif /* CONFIG_NFS_V4_2 */
+
+#define PROC(proc, argtype, restype) \
+[NFSPROC4_CLNT_##proc] = { \
+ .p_proc = NFSPROC4_COMPOUND, \
+ .p_encode = (kxdreproc_t)nfs4_xdr_##argtype, \
+ .p_decode = (kxdrdproc_t)nfs4_xdr_##restype, \
+ .p_arglen = NFS4_##argtype##_sz, \
+ .p_replen = NFS4_##restype##_sz, \
+ .p_statidx = NFSPROC4_CLNT_##proc, \
+ .p_name = #proc, \
+}
+
+#define STUB(proc) \
+[NFSPROC4_CLNT_##proc] = { \
+ .p_name = #proc, \
+}
+
+struct rpc_procinfo nfs4_procedures[] = {
+ PROC(READ, enc_read, dec_read),
+ PROC(WRITE, enc_write, dec_write),
+ PROC(COMMIT, enc_commit, dec_commit),
+ PROC(OPEN, enc_open, dec_open),
+ PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm),
+ PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr),
+ PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade),
+ PROC(CLOSE, enc_close, dec_close),
+ PROC(SETATTR, enc_setattr, dec_setattr),
+ PROC(FSINFO, enc_fsinfo, dec_fsinfo),
+ PROC(RENEW, enc_renew, dec_renew),
+ PROC(SETCLIENTID, enc_setclientid, dec_setclientid),
+ PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
+ PROC(LOCK, enc_lock, dec_lock),
+ PROC(LOCKT, enc_lockt, dec_lockt),
+ PROC(LOCKU, enc_locku, dec_locku),
+ PROC(ACCESS, enc_access, dec_access),
+ PROC(GETATTR, enc_getattr, dec_getattr),
+ PROC(LOOKUP, enc_lookup, dec_lookup),
+ PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root),
+ PROC(REMOVE, enc_remove, dec_remove),
+ PROC(RENAME, enc_rename, dec_rename),
+ PROC(LINK, enc_link, dec_link),
+ PROC(SYMLINK, enc_symlink, dec_symlink),
+ PROC(CREATE, enc_create, dec_create),
+ PROC(PATHCONF, enc_pathconf, dec_pathconf),
+ PROC(STATFS, enc_statfs, dec_statfs),
+ PROC(READLINK, enc_readlink, dec_readlink),
+ PROC(READDIR, enc_readdir, dec_readdir),
+ PROC(SERVER_CAPS, enc_server_caps, dec_server_caps),
+ PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn),
+ PROC(GETACL, enc_getacl, dec_getacl),
+ PROC(SETACL, enc_setacl, dec_setacl),
+ PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
+ PROC(RELEASE_LOCKOWNER, enc_release_lockowner, dec_release_lockowner),
+ PROC(SECINFO, enc_secinfo, dec_secinfo),
+ PROC(FSID_PRESENT, enc_fsid_present, dec_fsid_present),
+#if defined(CONFIG_NFS_V4_1)
+ PROC(EXCHANGE_ID, enc_exchange_id, dec_exchange_id),
+ PROC(CREATE_SESSION, enc_create_session, dec_create_session),
+ PROC(DESTROY_SESSION, enc_destroy_session, dec_destroy_session),
+ PROC(SEQUENCE, enc_sequence, dec_sequence),
+ PROC(GET_LEASE_TIME, enc_get_lease_time, dec_get_lease_time),
+ PROC(RECLAIM_COMPLETE, enc_reclaim_complete, dec_reclaim_complete),
+ PROC(GETDEVICEINFO, enc_getdeviceinfo, dec_getdeviceinfo),
+ PROC(LAYOUTGET, enc_layoutget, dec_layoutget),
+ PROC(LAYOUTCOMMIT, enc_layoutcommit, dec_layoutcommit),
+ PROC(LAYOUTRETURN, enc_layoutreturn, dec_layoutreturn),
+ PROC(SECINFO_NO_NAME, enc_secinfo_no_name, dec_secinfo_no_name),
+ PROC(TEST_STATEID, enc_test_stateid, dec_test_stateid),
+ PROC(FREE_STATEID, enc_free_stateid, dec_free_stateid),
+ STUB(GETDEVICELIST),
+ PROC(BIND_CONN_TO_SESSION,
+ enc_bind_conn_to_session, dec_bind_conn_to_session),
+ PROC(DESTROY_CLIENTID, enc_destroy_clientid, dec_destroy_clientid),
+#endif /* CONFIG_NFS_V4_1 */
+#ifdef CONFIG_NFS_V4_2
+ PROC(SEEK, enc_seek, dec_seek),
+ PROC(ALLOCATE, enc_allocate, dec_allocate),
+ PROC(DEALLOCATE, enc_deallocate, dec_deallocate),
+ PROC(LAYOUTSTATS, enc_layoutstats, dec_layoutstats),
+ PROC(CLONE, enc_clone, dec_clone),
+#endif /* CONFIG_NFS_V4_2 */
+};
+
+const struct rpc_version nfs_version4 = {
+ .number = 4,
+ .nrprocs = ARRAY_SIZE(nfs4_procedures),
+ .procs = nfs4_procedures
+};
+
+/*
+ * Local variables:
+ * c-basic-offset: 8
+ * End:
+ */