/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*- * vim:expandtab:shiftwidth=8:tabstop=8: * * Copyright (C) 2006 Cluster File Systems, Inc. * Author: Nathan Rutman * * This file is part of Lustre, http://www.lustre.org. * * Lustre is free software; you can redistribute it and/or * modify it under the terms of version 2 of the GNU General Public * License as published by the Free Software Foundation. * * Lustre is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with Lustre; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * * * Lustre disk format definitions. */ #ifndef _LUSTRE_DISK_H #define _LUSTRE_DISK_H #include /****************** on-disk files *********************/ #define MDT_LOGS_DIR "LOGS" /* COMPAT_146 */ #define MOUNT_CONFIGS_DIR "CONFIGS" /* Persistent mount data are stored on the disk in this file. */ #define MOUNT_DATA_FILE MOUNT_CONFIGS_DIR"/mountdata" #define LAST_RCVD "last_rcvd" #define LOV_OBJID "lov_objid" #define HEALTH_CHECK "health_check" /****************** persistent mount data *********************/ #define LDD_F_SV_TYPE_MDT 0x0001 #define LDD_F_SV_TYPE_OST 0x0002 #define LDD_F_SV_TYPE_MGS 0x0004 #define LDD_F_NEED_INDEX 0x0010 /* need an index assignment */ #define LDD_F_VIRGIN 0x0020 /* never registered */ #define LDD_F_UPDATE 0x0040 /* update all related config logs */ #define LDD_F_REWRITE_LDD 0x0080 /* rewrite the LDD */ #define LDD_F_WRITECONF 0x0100 /* regenerate all logs for this fs */ #define LDD_F_UPGRADE14 0x0200 /* COMPAT_14 */ #define LDD_F_PARAM 0x0400 /* process as lctl conf_param */ enum ldd_mount_type { LDD_MT_EXT3 = 0, LDD_MT_LDISKFS, LDD_MT_SMFS, LDD_MT_REISERFS, LDD_MT_LDISKFS2, LDD_MT_LAST }; static inline char *mt_str(enum ldd_mount_type mt) { static char *mount_type_string[] = { "ext3", "ldiskfs", "smfs", "reiserfs", "ldiskfs2", }; return mount_type_string[mt]; } #define LDD_INCOMPAT_SUPP 0 #define LDD_ROCOMPAT_SUPP 0 #define LDD_MAGIC 0x1dd00001 /* On-disk configuration file. In host-endian order. */ struct lustre_disk_data { __u32 ldd_magic; __u32 ldd_feature_compat; /* compatible feature flags */ __u32 ldd_feature_rocompat;/* read-only compatible feature flags */ __u32 ldd_feature_incompat;/* incompatible feature flags */ __u32 ldd_config_ver; /* config rewrite count - not used */ __u32 ldd_flags; /* LDD_SV_TYPE */ __u32 ldd_svindex; /* server index (0001), must match svname */ __u32 ldd_mount_type; /* target fs type LDD_MT_* */ char ldd_fsname[64]; /* filesystem this server is part of */ char ldd_svname[64]; /* this server's name (lustre-mdt0001)*/ __u8 ldd_uuid[40]; /* server UUID (COMPAT_146) */ /*200*/ char ldd_userdata[1024 - 200]; /* arbitrary user string */ /*1024*/__u8 ldd_padding[4096 - 1024]; /*4096*/char ldd_mount_opts[4096]; /* target fs mount opts */ /*8192*/char ldd_params[4096]; /* key=value pairs */ }; #define IS_MDT(data) ((data)->ldd_flags & LDD_F_SV_TYPE_MDT) #define IS_OST(data) ((data)->ldd_flags & LDD_F_SV_TYPE_OST) #define IS_MGS(data) ((data)->ldd_flags & LDD_F_SV_TYPE_MGS) #define MT_STR(data) mt_str((data)->ldd_mount_type) /* Make the mdt/ost server obd name based on the filesystem name */ static inline int server_make_name(__u32 flags, __u16 index, char *fs, char *name) { if (flags & (LDD_F_SV_TYPE_MDT | LDD_F_SV_TYPE_OST)) { sprintf(name, "%.8s-%s%04x", fs, (flags & LDD_F_SV_TYPE_MDT) ? "MDT" : "OST", index); } else if (flags & LDD_F_SV_TYPE_MGS) { sprintf(name, "MGS"); } else { CERROR("unknown server type %#x\n", flags); return 1; } return 0; } /* Get the index from the obd name */ int server_name2index(char *svname, __u32 *idx, char **endptr); /****************** mount command *********************/ /* The lmd is only used internally by Lustre; mount simply passes everything as string options */ #define LMD_MAGIC 0xbdacbd03 /* gleaned from the mount command - no persistent info here */ struct lustre_mount_data { __u32 lmd_magic; __u32 lmd_flags; /* lustre mount flags */ int lmd_mgs_failnodes; /* mgs failover node count */ int lmd_exclude_count; char *lmd_dev; /* device name */ char *lmd_profile; /* client only */ char *lmd_opts; /* lustre mount options (as opposed to _device_ mount options) */ __u32 *lmd_exclude; /* array of OSTs to ignore */ }; #define LMD_FLG_SERVER 0x0001 /* Mounting a server */ #define LMD_FLG_CLIENT 0x0002 /* Mounting a client */ #define LMD_FLG_ABORT_RECOV 0x0008 /* Abort recovery */ #define LMD_FLG_NOSVC 0x0010 /* Only start MGS/MGC for servers, no other services */ #define lmd_is_client(x) ((x)->lmd_flags & LMD_FLG_CLIENT) /****************** last_rcvd file *********************/ #define LR_SERVER_SIZE 512 #define LR_CLIENT_START 8192 #define LR_CLIENT_SIZE 128 #if LR_CLIENT_START < LR_SERVER_SIZE #error "Can't have LR_CLIENT_START < LR_SERVER_SIZE" #endif /* This limit is arbitrary (32k clients on x86), but it is convenient to use * 2^n * CFS_PAGE_SIZE * 8 for the number of bits that fit an order-n allocation. */ #define LR_MAX_CLIENTS (CFS_PAGE_SIZE * 8) /* COMPAT_146 */ #define OBD_COMPAT_OST 0x00000002 /* this is an OST (temporary) */ #define OBD_COMPAT_MDT 0x00000004 /* this is an MDT (temporary) */ /* end COMPAT_146 */ #define OBD_ROCOMPAT_LOVOBJID 0x00000001 /* MDS handles LOV_OBJID file */ #define OBD_ROCOMPAT_CROW 0x00000002 /* OST will CROW create objects */ #define OBD_INCOMPAT_GROUPS 0x00000001 /* OST handles group subdirs */ #define OBD_INCOMPAT_OST 0x00000002 /* this is an OST */ #define OBD_INCOMPAT_MDT 0x00000004 /* this is an MDT */ #define OBD_INCOMPAT_COMMON_LR 0x00000008 /* common last_rvcd format */ /* Data stored per server at the head of the last_rcvd file. In le32 order. This should be common to filter_internal.h, lustre_mds.h */ struct lr_server_data { __u8 lsd_uuid[40]; /* server UUID */ __u64 lsd_last_transno; /* last completed transaction ID */ __u64 lsd_compat14; /* reserved - compat with old last_rcvd */ __u64 lsd_mount_count; /* incarnation number */ __u32 lsd_feature_compat; /* compatible feature flags */ __u32 lsd_feature_rocompat;/* read-only compatible feature flags */ __u32 lsd_feature_incompat;/* incompatible feature flags */ __u32 lsd_server_size; /* size of server data area */ __u32 lsd_client_start; /* start of per-client data area */ __u16 lsd_client_size; /* size of per-client data area */ __u16 lsd_subdir_count; /* number of subdirectories for objects */ __u64 lsd_catalog_oid; /* recovery catalog object id */ __u32 lsd_catalog_ogen; /* recovery catalog inode generation */ __u8 lsd_peeruuid[40]; /* UUID of MDS associated with this OST */ __u32 lsd_ost_index; /* index number of OST in LOV */ __u32 lsd_mdt_index; /* index number of MDT in LMV */ __u8 lsd_padding[LR_SERVER_SIZE - 148]; }; /* Data stored per client in the last_rcvd file. In le32 order. */ struct lsd_client_data { __u8 lcd_uuid[40]; /* client UUID */ __u64 lcd_last_transno; /* last completed transaction ID */ __u64 lcd_last_xid; /* xid for the last transaction */ __u32 lcd_last_result; /* result from last RPC */ __u32 lcd_last_data; /* per-op data (disposition for open &c.) */ /* for MDS_CLOSE requests */ __u64 lcd_last_close_transno; /* last completed transaction ID */ __u64 lcd_last_close_xid; /* xid for the last transaction */ __u32 lcd_last_close_result; /* result from last RPC */ __u32 lcd_last_close_data; /* per-op data */ __u8 lcd_padding[LR_CLIENT_SIZE - 88]; }; #ifdef __KERNEL__ /****************** superblock additional info *********************/ struct ll_sb_info; struct lustre_sb_info { int lsi_flags; struct obd_device *lsi_mgc; /* mgc obd */ struct lustre_mount_data *lsi_lmd; /* mount command info */ struct lustre_disk_data *lsi_ldd; /* mount info on-disk */ struct ll_sb_info *lsi_llsbi; /* add'l client sbi info */ struct vfsmount *lsi_srv_mnt; /* the one server mount */ atomic_t lsi_mounts; /* references to the srv_mnt */ }; #define LSI_SERVER 0x00000001 #define LSI_UMOUNT_FORCE 0x00000010 #define LSI_UMOUNT_FAILOVER 0x00000020 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)) # define s2lsi(sb) ((struct lustre_sb_info *)((sb)->s_fs_info)) # define s2lsi_nocast(sb) ((sb)->s_fs_info) #else /* 2.4 here */ # define s2lsi(sb) ((struct lustre_sb_info *)((sb)->u.generic_sbp)) # define s2lsi_nocast(sb) ((sb)->u.generic_sbp) #endif #define get_profile_name(sb) (s2lsi(sb)->lsi_lmd->lmd_profile) #endif /* __KERNEL__ */ /****************** mount lookup info *********************/ struct lustre_mount_info { char *lmi_name; struct super_block *lmi_sb; struct vfsmount *lmi_mnt; struct list_head lmi_list_chain; }; /****************** prototypes *********************/ #ifdef __KERNEL__ #include /* obd_mount.c */ void lustre_register_client_fill_super(int (*cfs)(struct super_block *sb)); int lustre_common_put_super(struct super_block *sb); int lustre_process_log(struct super_block *sb, char *logname, struct config_llog_instance *cfg); int lustre_end_log(struct super_block *sb, char *logname, struct config_llog_instance *cfg); struct lustre_mount_info *server_get_mount(char *name); int server_put_mount(char *name, struct vfsmount *mnt); int server_register_target(struct super_block *sb); struct mgs_target_info; int server_mti_print(char *title, struct mgs_target_info *mti); /* mgc_request.c */ int mgc_logname2resid(char *logname, struct ldlm_res_id *res_id); #endif #endif // _LUSTRE_DISK_H