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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 HSM_ACTIONS "hsm_actions"
66 #define LFSCK_DIR "LFSCK"
67 #define LFSCK_BOOKMARK "lfsck_bookmark"
68 #define LFSCK_LAYOUT "lfsck_layout"
69 #define LFSCK_NAMESPACE "lfsck_namespace"
71 /****************** persistent mount data *********************/
73 #define LDD_F_SV_TYPE_MDT 0x0001
74 #define LDD_F_SV_TYPE_OST 0x0002
75 #define LDD_F_SV_TYPE_MGS 0x0004
76 #define LDD_F_SV_TYPE_MASK (LDD_F_SV_TYPE_MDT | \
79 #define LDD_F_SV_ALL 0x0008
80 /** need an index assignment */
81 #define LDD_F_NEED_INDEX 0x0010
82 /** never registered */
83 #define LDD_F_VIRGIN 0x0020
84 /** update the config logs for this server */
85 #define LDD_F_UPDATE 0x0040
86 /** rewrite the LDD */
87 #define LDD_F_REWRITE_LDD 0x0080
88 /** regenerate config logs for this fs or server */
89 #define LDD_F_WRITECONF 0x0100
91 #define LDD_F_UPGRADE14 0x0200
92 /** process as lctl conf_param */
93 #define LDD_F_PARAM 0x0400
94 /** all nodes are specified as service nodes */
95 #define LDD_F_NO_PRIMNODE 0x1000
97 #define LDD_F_IR_CAPABLE 0x2000
98 /** the MGS refused to register the target. */
99 #define LDD_F_ERROR 0x4000
100 /** process at lctl conf_param */
101 #define LDD_F_PARAM2 0x8000
103 #define LDD_MAGIC 0x1dd00001
105 #define XATTR_TARGET_RENAME "trusted.rename_tgt"
107 enum ldd_mount_type {
117 /****************** last_rcvd file *********************/
119 #define LR_EXPIRE_INTERVALS 16 /**< number of intervals to track transno */
120 #define LR_SERVER_SIZE 512
121 #define LR_CLIENT_START 8192
122 #define LR_CLIENT_SIZE 128
123 #if LR_CLIENT_START < LR_SERVER_SIZE
124 #error "Can't have LR_CLIENT_START < LR_SERVER_SIZE"
128 * Data stored per server at the head of the last_rcvd file. In le32 order.
130 struct lr_server_data {
131 __u8 lsd_uuid[40]; /* server UUID */
132 __u64 lsd_last_transno; /* last completed transaction ID */
133 __u64 lsd_compat14; /* reserved - compat with old last_rcvd */
134 __u64 lsd_mount_count; /* incarnation number */
135 __u32 lsd_feature_compat; /* compatible feature flags */
136 __u32 lsd_feature_rocompat;/* read-only compatible feature flags */
137 __u32 lsd_feature_incompat;/* incompatible feature flags */
138 __u32 lsd_server_size; /* size of server data area */
139 __u32 lsd_client_start; /* start of per-client data area */
140 __u16 lsd_client_size; /* size of per-client data area */
141 __u16 lsd_subdir_count; /* number of subdirectories for objects */
142 __u64 lsd_catalog_oid; /* recovery catalog object id */
143 __u32 lsd_catalog_ogen; /* recovery catalog inode generation */
144 __u8 lsd_peeruuid[40]; /* UUID of MDS associated with this OST */
145 __u32 lsd_osd_index; /* index number of OST in LOV */
146 __u32 lsd_padding1; /* was lsd_mdt_index, unused in 2.4.0 */
147 __u32 lsd_start_epoch; /* VBR: start epoch from last boot */
148 /** transaction values since lsd_trans_table_time */
149 __u64 lsd_trans_table[LR_EXPIRE_INTERVALS];
150 /** start point of transno table below */
151 __u32 lsd_trans_table_time; /* time of first slot in table above */
152 __u32 lsd_expire_intervals; /* LR_EXPIRE_INTERVALS */
153 __u8 lsd_padding[LR_SERVER_SIZE - 288];
156 /* Data stored per client in the last_rcvd file. In le32 order. */
157 struct lsd_client_data {
158 __u8 lcd_uuid[40]; /* client UUID */
159 __u64 lcd_last_transno; /* last completed transaction ID */
160 __u64 lcd_last_xid; /* xid for the last transaction */
161 __u32 lcd_last_result; /* result from last RPC */
162 __u32 lcd_last_data; /* per-op data (disposition for
165 /* for MDS_CLOSE requests */
166 __u64 lcd_last_close_transno; /* last completed transaction ID */
167 __u64 lcd_last_close_xid; /* xid for the last transaction */
168 __u32 lcd_last_close_result; /* result from last RPC */
169 __u32 lcd_last_close_data; /* per-op data */
170 /* VBR: last versions */
171 __u64 lcd_pre_versions[4];
172 __u32 lcd_last_epoch;
173 /* generation counter of client slot in last_rcvd */
174 __u32 lcd_generation;
175 __u8 lcd_padding[LR_CLIENT_SIZE - 128];
178 /* Data stored in each slot of the reply_data file.
180 * The lrd_client_gen field is assigned with lcd_generation value
181 * to allow identify which client the reply data belongs to.
183 struct lsd_reply_data {
184 __u64 lrd_transno; /* transaction number */
185 __u64 lrd_xid; /* transmission id */
186 __u64 lrd_data; /* per-operation data */
187 __u32 lrd_result; /* request result */
188 __u32 lrd_client_gen; /* client generation */
191 /* Header of the reply_data file */
192 #define LRH_MAGIC 0xbdabda01
193 struct lsd_reply_header {
195 __u32 lrh_header_size;
196 __u32 lrh_reply_size;
197 __u8 lrh_pad[sizeof(struct lsd_reply_data) - 12];
202 #endif /* _UAPI_LUSTRE_DISK_H */