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14 * in the LICENSE file that accompanied this code).
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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/
30 * Lustre is a trademark of Sun Microsystems, Inc.
32 * uapi/linux/lustre_disk.h
34 * Lustre disk format definitions.
36 * Author: Nathan Rutman <nathan.rutman@seagate.com>
39 #ifndef _UAPI_LUSTRE_DISK_H
40 #define _UAPI_LUSTRE_DISK_H
42 /** \defgroup disk disk
46 #include <linux/types.h>
48 /****************** on-disk files ********************/
50 #define MDT_LOGS_DIR "LOGS" /* COMPAT_146 */
51 #define MOUNT_CONFIGS_DIR "CONFIGS"
52 #define CONFIGS_FILE "mountdata"
53 /** Persistent mount data are stored on the disk in this file. */
54 #define MOUNT_DATA_FILE MOUNT_CONFIGS_DIR"/"CONFIGS_FILE
55 #define LAST_RCVD "last_rcvd"
56 #define REPLY_DATA "reply_data"
57 #define LOV_OBJID "lov_objid"
58 #define LOV_OBJSEQ "lov_objseq"
59 #define HEALTH_CHECK "health_check"
60 #define CAPA_KEYS "capa_keys"
61 #define CHANGELOG_USERS "changelog_users"
62 #define MGS_NIDTBL_DIR "NIDTBL_VERSIONS"
63 #define QMT_DIR "quota_master"
64 #define QSD_DIR "quota_slave"
65 #define QSD_DIR_DT "quota_slave_dt"
66 #define QSD_DIR_MD "quota_slave_md"
67 #define HSM_ACTIONS "hsm_actions"
68 #define LFSCK_DIR "LFSCK"
69 #define LFSCK_BOOKMARK "lfsck_bookmark"
70 #define LFSCK_LAYOUT "lfsck_layout"
71 #define LFSCK_NAMESPACE "lfsck_namespace"
72 #define REMOTE_PARENT_DIR "REMOTE_PARENT_DIR"
73 #define INDEX_BACKUP_DIR "index_backup"
74 #define MDT_ORPHAN_DIR "PENDING"
76 /****************** persistent mount data *********************/
78 #define LDD_F_SV_TYPE_MDT 0x0001
79 #define LDD_F_SV_TYPE_OST 0x0002
80 #define LDD_F_SV_TYPE_MGS 0x0004
81 #define LDD_F_SV_TYPE_MASK (LDD_F_SV_TYPE_MDT | \
84 #define LDD_F_SV_ALL 0x0008
85 /** need an index assignment */
86 #define LDD_F_NEED_INDEX 0x0010
87 /** never registered */
88 #define LDD_F_VIRGIN 0x0020
89 /** update the config logs for this server */
90 #define LDD_F_UPDATE 0x0040
91 /** rewrite the LDD */
92 #define LDD_F_REWRITE_LDD 0x0080
93 /** regenerate config logs for this fs or server */
94 #define LDD_F_WRITECONF 0x0100
96 /*#define LDD_F_UPGRADE14 0x0200 deprecated since 1.8 */
97 /** process as lctl conf_param */
98 #define LDD_F_PARAM 0x0400
99 /** all nodes are specified as service nodes */
100 #define LDD_F_NO_PRIMNODE 0x1000
101 /** IR enable flag */
102 #define LDD_F_IR_CAPABLE 0x2000
103 /** the MGS refused to register the target. */
104 #define LDD_F_ERROR 0x4000
105 /** process at lctl conf_param */
106 #define LDD_F_PARAM2 0x8000
108 #define LDD_MAGIC 0x1dd00001
110 #define XATTR_TARGET_RENAME "trusted.rename_tgt"
112 enum ldd_mount_type {
122 /****************** last_rcvd file *********************/
124 #define LR_EXPIRE_INTERVALS 16 /**< number of intervals to track transno */
125 #define LR_SERVER_SIZE 512
126 #define LR_CLIENT_START 8192
127 #define LR_CLIENT_SIZE 128
128 #if LR_CLIENT_START < LR_SERVER_SIZE
129 #error "Can't have LR_CLIENT_START < LR_SERVER_SIZE"
133 * Data stored per server at the head of the last_rcvd file. In le32 order.
135 struct lr_server_data {
136 __u8 lsd_uuid[40]; /* server UUID */
137 __u64 lsd_last_transno; /* last completed transaction ID */
138 __u64 lsd_compat14; /* reserved - compat with old last_rcvd */
139 __u64 lsd_mount_count; /* incarnation number */
140 __u32 lsd_feature_compat; /* compatible feature flags */
141 __u32 lsd_feature_rocompat;/* read-only compatible feature flags */
142 __u32 lsd_feature_incompat;/* incompatible feature flags */
143 __u32 lsd_server_size; /* size of server data area */
144 __u32 lsd_client_start; /* start of per-client data area */
145 __u16 lsd_client_size; /* size of per-client data area */
146 __u16 lsd_subdir_count; /* number of subdirectories for objects */
147 __u64 lsd_catalog_oid; /* recovery catalog object id */
148 __u32 lsd_catalog_ogen; /* recovery catalog inode generation */
149 __u8 lsd_peeruuid[40]; /* UUID of MDS associated with this OST */
150 __u32 lsd_osd_index; /* index number of OST in LOV */
151 __u32 lsd_padding1; /* was lsd_mdt_index, unused in 2.4.0 */
152 __u32 lsd_start_epoch; /* VBR: start epoch from last boot */
153 /** transaction values since lsd_trans_table_time */
154 __u64 lsd_trans_table[LR_EXPIRE_INTERVALS];
155 /** start point of transno table below */
156 __u32 lsd_trans_table_time; /* time of first slot in table above */
157 __u32 lsd_expire_intervals; /* LR_EXPIRE_INTERVALS */
158 __u8 lsd_padding[LR_SERVER_SIZE - 288];
161 /* Data stored per client in the last_rcvd file. In le32 order. */
162 struct lsd_client_data {
163 __u8 lcd_uuid[40]; /* client UUID */
164 __u64 lcd_last_transno; /* last completed transaction ID */
165 __u64 lcd_last_xid; /* xid for the last transaction */
166 __u32 lcd_last_result; /* result from last RPC */
167 __u32 lcd_last_data; /* per-op data (disposition for
170 /* for MDS_CLOSE requests */
171 __u64 lcd_last_close_transno; /* last completed transaction ID */
172 __u64 lcd_last_close_xid; /* xid for the last transaction */
173 __u32 lcd_last_close_result; /* result from last RPC */
174 __u32 lcd_last_close_data; /* per-op data */
175 /* VBR: last versions */
176 __u64 lcd_pre_versions[4];
177 __u32 lcd_last_epoch;
178 /* generation counter of client slot in last_rcvd */
179 __u32 lcd_generation;
180 __u8 lcd_padding[LR_CLIENT_SIZE - 128];
183 /* Data stored in each slot of the reply_data file.
185 * The lrd_client_gen field is assigned with lcd_generation value
186 * to allow identify which client the reply data belongs to.
188 struct lsd_reply_data {
189 __u64 lrd_transno; /* transaction number */
190 __u64 lrd_xid; /* transmission id */
191 __u64 lrd_data; /* per-operation data */
192 __u32 lrd_result; /* request result */
193 __u32 lrd_client_gen; /* client generation */
196 /* Header of the reply_data file */
197 #define LRH_MAGIC 0xbdabda01
198 struct lsd_reply_header {
200 __u32 lrh_header_size;
201 __u32 lrh_reply_size;
202 __u8 lrh_pad[sizeof(struct lsd_reply_data) - 12];
207 #endif /* _UAPI_LUSTRE_DISK_H */