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+/*
+ * pNFS-osd on-the-wire data structures
+ *
+ * Copyright (C) 2007 Panasas Inc. [year of first publication]
+ * All rights reserved.
+ *
+ * Benny Halevy <bhalevy@panasas.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * See the file COPYING included with this distribution for more details.
+ *
+ * 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 Panasas company 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.
+ */
+#ifndef __PNFS_OSD_XDR_H__
+#define __PNFS_OSD_XDR_H__
+
+#include <linux/nfs_fs.h>
+#include <linux/nfs_page.h>
+#include <linux/exp_xdr.h>
+#include <scsi/osd_protocol.h>
+
+#define PNFS_OSD_OSDNAME_MAXSIZE 256
+
+/*
+ * START OF "GENERIC" DECODE ROUTINES.
+ * These may look a little ugly since they are imported from a "generic"
+ * set of XDR encode/decode routines which are intended to be shared by
+ * all of our NFSv4 implementations (OpenBSD, MacOS X...).
+ *
+ * If the pain of reading these is too great, it should be a straightforward
+ * task to translate them into Linux-specific versions which are more
+ * consistent with the style used in NFSv2/v3...
+ */
+#define READ32(x) (x) = ntohl(*p++)
+#define READ64(x) do { \
+ (x) = (u64)ntohl(*p++) << 32; \
+ (x) |= ntohl(*p++); \
+} while (0)
+#define COPYMEM(x, nbytes) do { \
+ memcpy((x), p, nbytes); \
+ p += XDR_QUADLEN(nbytes); \
+} while (0)
+
+/*
+ * draft-ietf-nfsv4-minorversion-22
+ * draft-ietf-nfsv4-pnfs-obj-12
+ */
+
+/* Layout Structure */
+
+enum pnfs_osd_raid_algorithm4 {
+ PNFS_OSD_RAID_0 = 1,
+ PNFS_OSD_RAID_4 = 2,
+ PNFS_OSD_RAID_5 = 3,
+ PNFS_OSD_RAID_PQ = 4 /* Reed-Solomon P+Q */
+};
+
+/* struct pnfs_osd_data_map4 {
+ * uint32_t odm_num_comps;
+ * length4 odm_stripe_unit;
+ * uint32_t odm_group_width;
+ * uint32_t odm_group_depth;
+ * uint32_t odm_mirror_cnt;
+ * pnfs_osd_raid_algorithm4 odm_raid_algorithm;
+ * };
+ */
+struct pnfs_osd_data_map {
+ u32 odm_num_comps;
+ u64 odm_stripe_unit;
+ u32 odm_group_width;
+ u32 odm_group_depth;
+ u32 odm_mirror_cnt;
+ u32 odm_raid_algorithm;
+};
+
+static inline int
+pnfs_osd_data_map_xdr_sz(void)
+{
+ return 1 + 2 + 1 + 1 + 1 + 1;
+}
+
+static inline size_t
+pnfs_osd_data_map_incore_sz(void)
+{
+ return sizeof(struct pnfs_osd_data_map);
+}
+
+/* struct pnfs_osd_objid4 {
+ * deviceid4 oid_device_id;
+ * uint64_t oid_partition_id;
+ * uint64_t oid_object_id;
+ * };
+ */
+struct pnfs_osd_objid {
+ struct nfs4_deviceid oid_device_id;
+ u64 oid_partition_id;
+ u64 oid_object_id;
+};
+
+/* For printout. I use "dev(%llx:%llx)", _DEVID_LO(), _DEVID_HI BE style */
+#define _DEVID_LO(oid_device_id) \
+ (unsigned long long)be64_to_cpup((__be64 *)oid_device_id.data)
+
+#define _DEVID_HI(oid_device_id) \
+ (unsigned long long)be64_to_cpup(((__be64 *)oid_device_id.data) + 1)
+
+static inline int
+pnfs_osd_objid_xdr_sz(void)
+{
+ return (NFS4_DEVICEID4_SIZE / 4) + 2 + 2;
+}
+
+static inline size_t
+pnfs_osd_objid_incore_sz(void)
+{
+ return sizeof(struct pnfs_osd_objid);
+}
+
+enum pnfs_osd_version {
+ PNFS_OSD_MISSING = 0,
+ PNFS_OSD_VERSION_1 = 1,
+ PNFS_OSD_VERSION_2 = 2
+};
+
+struct pnfs_osd_opaque_cred {
+ u32 cred_len;
+ u8 *cred;
+};
+
+static inline int
+pnfs_osd_opaque_cred_xdr_sz(__be32 *p)
+{
+ u32 *start = p;
+ u32 n;
+
+ READ32(n);
+ p += XDR_QUADLEN(n);
+ return p - start;
+}
+
+static inline size_t
+pnfs_osd_opaque_cred_incore_sz(__be32 *p)
+{
+ u32 n;
+
+ READ32(n);
+ return XDR_QUADLEN(n) * 4;
+}
+
+enum pnfs_osd_cap_key_sec {
+ PNFS_OSD_CAP_KEY_SEC_NONE = 0,
+ PNFS_OSD_CAP_KEY_SEC_SSV = 1,
+};
+
+/* struct pnfs_osd_object_cred4 {
+ * pnfs_osd_objid4 oc_object_id;
+ * pnfs_osd_version4 oc_osd_version;
+ * pnfs_osd_cap_key_sec4 oc_cap_key_sec;
+ * opaque oc_capability_key<>;
+ * opaque oc_capability<>;
+ * };
+ */
+struct pnfs_osd_object_cred {
+ struct pnfs_osd_objid oc_object_id;
+ u32 oc_osd_version;
+ u32 oc_cap_key_sec;
+ struct pnfs_osd_opaque_cred oc_cap_key;
+ struct pnfs_osd_opaque_cred oc_cap;
+};
+
+static inline int
+pnfs_osd_object_cred_xdr_sz(__be32 *p)
+{
+ __be32 *start = p;
+
+ p += pnfs_osd_objid_xdr_sz() + 2;
+ p += pnfs_osd_opaque_cred_xdr_sz(p);
+ p += pnfs_osd_opaque_cred_xdr_sz(p);
+ return p - start;
+}
+
+static inline size_t
+pnfs_osd_object_cred_incore_sz(__be32 *p)
+{
+ size_t sz = sizeof(struct pnfs_osd_object_cred);
+
+ p += pnfs_osd_objid_xdr_sz() + 2;
+ sz += pnfs_osd_opaque_cred_incore_sz(p);
+ p += pnfs_osd_opaque_cred_xdr_sz(p);
+ sz += pnfs_osd_opaque_cred_incore_sz(p);
+ return sz;
+}
+
+/* struct pnfs_osd_layout4 {
+ * pnfs_osd_data_map4 olo_map;
+ * uint32_t olo_comps_index;
+ * pnfs_osd_object_cred4 olo_components<>;
+ * };
+ */
+struct pnfs_osd_layout {
+ struct pnfs_osd_data_map olo_map;
+ u32 olo_comps_index;
+ u32 olo_num_comps;
+ struct pnfs_osd_object_cred *olo_comps;
+};
+
+static inline int
+pnfs_osd_layout_xdr_sz(__be32 *p)
+{
+ __be32 *start = p;
+ u32 n;
+
+ p += pnfs_osd_data_map_xdr_sz() + 1;
+ READ32(n);
+ while ((int)(n--) > 0)
+ p += pnfs_osd_object_cred_xdr_sz(p);
+ return p - start;
+}
+
+static inline size_t
+pnfs_osd_layout_incore_sz(__be32 *p)
+{
+ u32 n;
+ size_t sz;
+
+ p += pnfs_osd_data_map_xdr_sz() + 1;
+ READ32(n);
+ sz = sizeof(struct pnfs_osd_layout);
+ while ((int)(n--) > 0) {
+ sz += pnfs_osd_object_cred_incore_sz(p);
+ p += pnfs_osd_object_cred_xdr_sz(p);
+ }
+ return sz;
+}
+
+/* Device Address */
+
+enum pnfs_osd_targetid_type {
+ OBJ_TARGET_ANON = 1,
+ OBJ_TARGET_SCSI_NAME = 2,
+ OBJ_TARGET_SCSI_DEVICE_ID = 3,
+};
+
+/* union pnfs_osd_targetid4 switch (pnfs_osd_targetid_type4 oti_type) {
+ * case OBJ_TARGET_SCSI_NAME:
+ * string oti_scsi_name<>;
+ *
+ * case OBJ_TARGET_SCSI_DEVICE_ID:
+ * opaque oti_scsi_device_id<>;
+ *
+ * default:
+ * void;
+ * };
+ *
+ * union pnfs_osd_targetaddr4 switch (bool ota_available) {
+ * case TRUE:
+ * netaddr4 ota_netaddr;
+ * case FALSE:
+ * void;
+ * };
+ *
+ * struct pnfs_osd_deviceaddr4 {
+ * pnfs_osd_targetid4 oda_targetid;
+ * pnfs_osd_targetaddr4 oda_targetaddr;
+ * uint64_t oda_lun;
+ * opaque oda_systemid<>;
+ * pnfs_osd_object_cred4 oda_root_obj_cred;
+ * opaque oda_osdname<>;
+ * };
+ */
+struct pnfs_osd_targetid {
+ u32 oti_type;
+ struct nfs4_string oti_scsi_device_id;
+};
+
+enum { PNFS_OSD_TARGETID_MAX = 1 + PNFS_OSD_OSDNAME_MAXSIZE / 4 };
+
+/* struct netaddr4 {
+ * // see struct rpcb in RFC1833
+ * string r_netid<>; // network id
+ * string r_addr<>; // universal address
+ * };
+ */
+struct pnfs_osd_net_addr {
+ struct nfs4_string r_netid;
+ struct nfs4_string r_addr;
+};
+
+struct pnfs_osd_targetaddr {
+ u32 ota_available;
+ struct pnfs_osd_net_addr ota_netaddr;
+};
+
+enum {
+ NETWORK_ID_MAX = 16 / 4,
+ UNIVERSAL_ADDRESS_MAX = 64 / 4,
+ PNFS_OSD_TARGETADDR_MAX = 3 + NETWORK_ID_MAX + UNIVERSAL_ADDRESS_MAX,
+};
+
+struct pnfs_osd_deviceaddr {
+ struct pnfs_osd_targetid oda_targetid;
+ struct pnfs_osd_targetaddr oda_targetaddr;
+ u8 oda_lun[8];
+ struct nfs4_string oda_systemid;
+ struct pnfs_osd_object_cred oda_root_obj_cred;
+ struct nfs4_string oda_osdname;
+};
+
+enum {
+ ODA_OSDNAME_MAX = PNFS_OSD_OSDNAME_MAXSIZE / 4,
+ PNFS_OSD_DEVICEADDR_MAX =
+ PNFS_OSD_TARGETID_MAX + PNFS_OSD_TARGETADDR_MAX +
+ 2 /*oda_lun*/ +
+ 1 + OSD_SYSTEMID_LEN +
+ 1 + ODA_OSDNAME_MAX,
+};
+
+/* LAYOUTCOMMIT: layoutupdate */
+
+/* union pnfs_osd_deltaspaceused4 switch (bool dsu_valid) {
+ * case TRUE:
+ * int64_t dsu_delta;
+ * case FALSE:
+ * void;
+ * };
+ *
+ * struct pnfs_osd_layoutupdate4 {
+ * pnfs_osd_deltaspaceused4 olu_delta_space_used;
+ * bool olu_ioerr_flag;
+ * };
+ */
+struct pnfs_osd_layoutupdate {
+ u32 dsu_valid;
+ s64 dsu_delta;
+ u32 olu_ioerr_flag;
+};
+
+/* LAYOUTRETURN: I/O Rrror Report */
+
+enum pnfs_osd_errno {
+ PNFS_OSD_ERR_EIO = 1,
+ PNFS_OSD_ERR_NOT_FOUND = 2,
+ PNFS_OSD_ERR_NO_SPACE = 3,
+ PNFS_OSD_ERR_BAD_CRED = 4,
+ PNFS_OSD_ERR_NO_ACCESS = 5,
+ PNFS_OSD_ERR_UNREACHABLE = 6,
+ PNFS_OSD_ERR_RESOURCE = 7
+};
+
+/* struct pnfs_osd_ioerr4 {
+ * pnfs_osd_objid4 oer_component;
+ * length4 oer_comp_offset;
+ * length4 oer_comp_length;
+ * bool oer_iswrite;
+ * pnfs_osd_errno4 oer_errno;
+ * };
+ */
+struct pnfs_osd_ioerr {
+ struct pnfs_osd_objid oer_component;
+ u64 oer_comp_offset;
+ u64 oer_comp_length;
+ u32 oer_iswrite;
+ u32 oer_errno;
+};
+
+static inline unsigned
+pnfs_osd_ioerr_xdr_sz(void)
+{
+ return pnfs_osd_objid_xdr_sz() + 2 + 2 + 1 + 1;
+}
+
+/* OSD XDR API */
+
+/* Layout helpers */
+extern struct pnfs_osd_layout *pnfs_osd_xdr_decode_layout(
+ struct pnfs_osd_layout *layout, __be32 *p);
+
+extern int pnfs_osd_xdr_encode_layout(
+ struct exp_xdr_stream *xdr,
+ struct pnfs_osd_layout *layout);
+
+/* Device Info helpers */
+
+/* First pass calculate total size for space needed */
+extern size_t pnfs_osd_xdr_deviceaddr_incore_sz(__be32 *p);
+
+/* Note: some strings pointed to inside @deviceaddr might point
+ * to space inside @p. @p should stay valid while @deviceaddr
+ * is in use.
+ * It is assumed that @deviceaddr points to bigger memory of size
+ * calculated in first pass by pnfs_osd_xdr_deviceaddr_incore_sz()
+ */
+extern void pnfs_osd_xdr_decode_deviceaddr(
+ struct pnfs_osd_deviceaddr *deviceaddr, __be32 *p);
+
+/* For Servers */
+extern int pnfs_osd_xdr_encode_deviceaddr(
+ struct exp_xdr_stream *xdr, struct pnfs_osd_deviceaddr *devaddr);
+
+/* layoutupdate (layout_commit) xdr helpers */
+extern int
+pnfs_osd_xdr_encode_layoutupdate(struct xdr_stream *xdr,
+ struct pnfs_osd_layoutupdate *lou);
+extern __be32 *
+pnfs_osd_xdr_decode_layoutupdate(struct pnfs_osd_layoutupdate *lou, __be32 *p);
+
+/* osd_ioerror encoding/decoding (layout_return) */
+extern int
+pnfs_osd_xdr_encode_ioerr(struct xdr_stream *xdr, struct pnfs_osd_ioerr *ioerr);
+extern __be32 *
+pnfs_osd_xdr_decode_ioerr(struct pnfs_osd_ioerr *ioerr, __be32 *p);
+
+#endif /* __PNFS_OSD_XDR_H__ */