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6 * This program is free software; you can redistribute it and/or modify
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14 * in the LICENSE file that accompanied this code).
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18 * http://www.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2011, 2016, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
31 * Lustre disk format definitions.
33 * Author: Nathan Rutman <nathan.rutman@seagate.com>
36 #ifndef _UAPI_LUSTRE_DISK_H
37 #define _UAPI_LUSTRE_DISK_H
39 /** \defgroup disk disk
43 #include <linux/types.h>
45 /****************** on-disk files ********************/
47 #define MDT_LOGS_DIR "LOGS" /* COMPAT_146 */
48 #define MOUNT_CONFIGS_DIR "CONFIGS"
49 #define CONFIGS_FILE "mountdata"
50 /** Persistent mount data are stored on the disk in this file. */
51 #define MOUNT_DATA_FILE MOUNT_CONFIGS_DIR"/"CONFIGS_FILE
52 #define LAST_RCVD "last_rcvd"
53 #define REPLY_DATA "reply_data"
54 #define LOV_OBJID "lov_objid"
55 #define LOV_OBJSEQ "lov_objseq"
56 #define HEALTH_CHECK "health_check"
57 #define CAPA_KEYS "capa_keys"
58 #define CHANGELOG_USERS "changelog_users"
59 #define MGS_NIDTBL_DIR "NIDTBL_VERSIONS"
60 #define QMT_DIR "quota_master"
61 #define QSD_DIR "quota_slave"
62 #define QSD_DIR_DT "quota_slave_dt"
63 #define QSD_DIR_MD "quota_slave_md"
64 #define HSM_ACTIONS "hsm_actions"
65 #define LFSCK_DIR "LFSCK"
66 #define LFSCK_BOOKMARK "lfsck_bookmark"
67 #define LFSCK_LAYOUT "lfsck_layout"
68 #define LFSCK_NAMESPACE "lfsck_namespace"
69 #define REMOTE_PARENT_DIR "REMOTE_PARENT_DIR"
70 #define INDEX_BACKUP_DIR "index_backup"
71 #define MDT_ORPHAN_DIR "PENDING"
73 /* On-disk configuration file. In host-endian order. */
74 struct lustre_disk_data {
76 __u32 ldd_feature_compat; /* compatible feature flags */
77 __u32 ldd_feature_rocompat; /* read-only compatible feature flags */
78 __u32 ldd_feature_incompat; /* incompatible feature flags */
80 __u32 ldd_config_ver; /* config rewrite count - not used */
81 __u32 ldd_flags; /* LDD_SV_TYPE */
82 __u32 ldd_svindex; /* server index (0001), must match
85 __u32 ldd_mount_type; /* target fs type LDD_MT_* */
86 char ldd_fsname[64]; /* filesystem this server is part of,
89 char ldd_svname[64]; /* this server's name (lustre-mdt0001)*/
90 __u8 ldd_uuid[40]; /* server UUID (COMPAT_146) */
92 char ldd_userdata[1024 - 200]; /* arbitrary user string '200' */
93 __u8 ldd_padding[4096 - 1024]; /* 1024 */
94 char ldd_mount_opts[4096]; /* target fs mount opts '4096' */
95 char ldd_params[4096]; /* key=value pairs '8192' */
98 /****************** persistent mount data *********************/
100 #define LDD_F_SV_TYPE_MDT 0x0001
101 #define LDD_F_SV_TYPE_OST 0x0002
102 #define LDD_F_SV_TYPE_MGS 0x0004
103 #define LDD_F_SV_TYPE_MASK (LDD_F_SV_TYPE_MDT | \
104 LDD_F_SV_TYPE_OST | \
106 #define LDD_F_SV_ALL 0x0008
107 /** need an index assignment */
108 #define LDD_F_NEED_INDEX 0x0010
109 /** never registered */
110 #define LDD_F_VIRGIN 0x0020
111 /** update the config logs for this server */
112 #define LDD_F_UPDATE 0x0040
113 /** rewrite the LDD */
114 #define LDD_F_REWRITE_LDD 0x0080
115 /** regenerate config logs for this fs or server */
116 #define LDD_F_WRITECONF 0x0100
118 /*#define LDD_F_UPGRADE14 0x0200 deprecated since 1.8 */
119 /** process as lctl conf_param */
120 #define LDD_F_PARAM 0x0400
121 /** all nodes are specified as service nodes */
122 #define LDD_F_NO_PRIMNODE 0x1000
123 /** IR enable flag */
124 #define LDD_F_IR_CAPABLE 0x2000
125 /** the MGS refused to register the target. */
126 #define LDD_F_ERROR 0x4000
127 /** process at lctl conf_param */
128 #define LDD_F_PARAM2 0x8000
129 /** the target shouldn't use local logs */
130 #define LDD_F_NO_LOCAL_LOGS 0x10000
132 #define LDD_MAGIC 0x1dd00001
134 #define XATTR_TARGET_RENAME "trusted.rename_tgt"
136 enum ldd_mount_type {
146 /****************** last_rcvd file *********************/
148 #define LR_EXPIRE_INTERVALS 16 /**< number of intervals to track transno */
149 #define LR_SERVER_SIZE 512
150 #define LR_CLIENT_START 8192
151 #define LR_CLIENT_SIZE 128
152 #if LR_CLIENT_START < LR_SERVER_SIZE
153 #error "Can't have LR_CLIENT_START < LR_SERVER_SIZE"
157 * Data stored per server at the head of the last_rcvd file. In le32 order.
159 struct lr_server_data {
160 __u8 lsd_uuid[40]; /* server UUID */
161 __u64 lsd_last_transno; /* last completed transaction ID */
162 __u64 lsd_compat14; /* reserved - compat with old last_rcvd */
163 __u64 lsd_mount_count; /* incarnation number */
164 __u32 lsd_feature_compat; /* compatible feature flags */
165 __u32 lsd_feature_rocompat;/* read-only compatible feature flags */
166 __u32 lsd_feature_incompat;/* incompatible feature flags */
167 __u32 lsd_server_size; /* size of server data area */
168 __u32 lsd_client_start; /* start of per-client data area */
169 __u16 lsd_client_size; /* size of per-client data area */
170 __u16 lsd_subdir_count; /* number of subdirectories for objects */
171 __u64 lsd_catalog_oid; /* recovery catalog object id */
172 __u32 lsd_catalog_ogen; /* recovery catalog inode generation */
173 __u8 lsd_peeruuid[40]; /* UUID of MDS associated with this OST */
174 __u32 lsd_osd_index; /* index number of OST in LOV */
175 __u32 lsd_padding1; /* was lsd_mdt_index, unused in 2.4.0 */
176 __u32 lsd_start_epoch; /* VBR: start epoch from last boot */
177 /** transaction values since lsd_trans_table_time */
178 __u64 lsd_trans_table[LR_EXPIRE_INTERVALS];
179 /** start point of transno table below */
180 __u32 lsd_trans_table_time; /* time of first slot in table above */
181 __u32 lsd_expire_intervals; /* LR_EXPIRE_INTERVALS */
182 __u8 lsd_padding[LR_SERVER_SIZE - 288];
185 /* Data stored per client in the last_rcvd file. In le32 order. */
186 struct lsd_client_data {
187 __u8 lcd_uuid[40]; /* client UUID */
188 __u64 lcd_last_transno; /* last completed transaction ID */
189 __u64 lcd_last_xid; /* xid for the last transaction */
190 __u32 lcd_last_result; /* result from last RPC */
191 __u32 lcd_last_data; /* per-op data (disposition for
194 /* for MDS_CLOSE requests */
195 __u64 lcd_last_close_transno; /* last completed transaction ID */
196 __u64 lcd_last_close_xid; /* xid for the last transaction */
197 __u32 lcd_last_close_result; /* result from last RPC */
198 __u32 lcd_last_close_data; /* per-op data */
199 /* VBR: last versions */
200 __u64 lcd_pre_versions[4];
201 __u32 lcd_last_epoch;
202 /* generation counter of client slot in last_rcvd */
203 __u32 lcd_generation;
204 __u8 lcd_padding[LR_CLIENT_SIZE - 128];
207 /* Data stored in each slot of the reply_data file.
209 * The lrd_client_gen field is assigned with lcd_generation value
210 * to allow identify which client the reply data belongs to.
212 struct lsd_reply_data {
213 __u64 lrd_transno; /* transaction number */
214 __u64 lrd_xid; /* transmission id */
215 __u64 lrd_data; /* per-operation data */
216 __u32 lrd_result; /* request result */
217 __u32 lrd_client_gen; /* client generation */
220 /* Header of the reply_data file */
221 #define LRH_MAGIC 0xbdabda01
222 struct lsd_reply_header {
224 __u32 lrh_header_size;
225 __u32 lrh_reply_size;
226 __u8 lrh_pad[sizeof(struct lsd_reply_data) - 12];
231 #endif /* _UAPI_LUSTRE_DISK_H */