/* * GPL HEADER START * * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 only, * as published by the Free Software Foundation. * This program 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 version 2 for more details. A copy is * included in the COPYING file that accompanied this code. * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * GPL HEADER END */ /* * Copyright (c) 2012 Intel Corporation. */ /* * lustre/mdd/mdd_lfsck.h * * Shared definitions and declarations for the LFSCK. * * Author: Fan, Yong */ #ifndef _MDD_LFSCK_H # define _MDD_LFSCK_H #include enum lfsck_status { /* The lfsck file is new created, for new MDT, upgrading from old disk, * or re-creating the lfsck file manually. */ LS_INIT = 0, /* The first-step system scanning. */ LS_SCANNING_PHASE1 = 1, /* The second-step system scanning. */ LS_SCANNING_PHASE2 = 2, /* The LFSCK processing has completed for all objects. */ LS_COMPLETED = 3, /* The LFSCK exited automatically for failure, will not auto restart. */ LS_FAILED = 4, /* The LFSCK is stopped manually, will not auto restart. */ LS_STOPPED = 5, /* LFSCK is paused automatically when umount, * will be restarted automatically when remount. */ LS_PAUSED = 6, /* System crashed during the LFSCK, * will be restarted automatically after recovery. */ LS_CRASHED = 7, }; enum lfsck_flags { /* Finish to the cycle scanning. */ LF_SCANNED_ONCE = 0x00000001ULL, /* There is some namespace inconsistency. */ LF_INCONSISTENT = 0x00000002ULL, /* The device is upgraded from 1.8 format. */ LF_UPGRADE = 0x00000004ULL, }; struct lfsck_position { /* local layer object table-based iteration position. */ __u64 lp_oit_cookie; /* parent FID for directory traversal. */ struct lu_fid lp_dir_parent; /* namespace-based directory traversal position. */ __u64 lp_dir_cookie; }; #define LFSCK_BOOKMARK_MAGIC 0x20130C1D struct lfsck_bookmark { /* Magic number to detect that this struct contains valid data. */ __u32 lb_magic; /* For compatible with old versions. */ __u16 lb_version; /* See 'enum lfsck_param_flags' */ __u16 lb_param; /* How many items can be scanned at most per second. */ __u32 lb_speed_limit; /* For 64-bits aligned. */ __u32 lb_padding; /* For future using. */ __u64 lb_reserved[6]; }; #define LFSCK_NAMESPACE_MAGIC 0xA0629D03 struct lfsck_namespace { /* Magic number to detect that this struct contains valid data. */ __u32 ln_magic; /* See 'enum lfsck_status'. */ __u32 ln_status; /* See 'enum lfsck_flags'. */ __u32 ln_flags; /* How many completed LFSCK runs on the device. */ __u32 ln_success_count; /* How long the LFSCK phase1 has run in seconds. */ __u32 ln_run_time_phase1; /* How long the LFSCK phase2 has run in seconds. */ __u32 ln_run_time_phase2; /* Time for the last LFSCK completed in seconds since epoch. */ __u64 ln_time_last_complete; /* Time for the latest LFSCK ran in seconds since epoch. */ __u64 ln_time_latest_start; /* Time for the last LFSCK checkpoint in seconds since epoch. */ __u64 ln_time_last_checkpoint; /* Position for the latest LFSCK started from. */ struct lfsck_position ln_pos_latest_start; /* Position for the last LFSCK checkpoint. */ struct lfsck_position ln_pos_last_checkpoint; /* Position for the first should be updated object. */ struct lfsck_position ln_pos_first_inconsistent; /* How many items (including dir) have been checked. */ __u64 ln_items_checked; /* How many items have been repaired. */ __u64 ln_items_repaired; /* How many items failed to be processed. */ __u64 ln_items_failed; /* How many directories have been traversed. */ __u64 ln_dirs_checked; /* How many multiple-linked objects have been checked. */ __u64 ln_mlinked_checked; /* How many objects have been double scanned. */ __u64 ln_objs_checked_phase2; /* How many objects have been reparied during double scan. */ __u64 ln_objs_repaired_phase2; /* How many objects failed to be processed during double scan. */ __u64 ln_objs_failed_phase2; /* How many objects with nlink fixed. */ __u64 ln_objs_nlink_repaired; /* How many objects were lost before, but found back now. */ __u64 ln_objs_lost_found; /* The latest object has been processed (failed) during double scan. */ struct lu_fid ln_fid_latest_scanned_phase2; /* For further using. 256-bytes aligned now. */ __u64 ln_reserved[2]; }; struct lfsck_component; struct mdd_object; struct lfsck_operations { int (*lfsck_reset)(const struct lu_env *env, struct lfsck_component *com, bool init); void (*lfsck_fail)(const struct lu_env *env, struct lfsck_component *com, bool oit, bool new_checked); int (*lfsck_checkpoint)(const struct lu_env *env, struct lfsck_component *com, bool init); int (*lfsck_prep)(const struct lu_env *env, struct lfsck_component *com); int (*lfsck_exec_oit)(const struct lu_env *env, struct lfsck_component *com, struct mdd_object *obj); int (*lfsck_exec_dir)(const struct lu_env *env, struct lfsck_component *com, struct mdd_object *obj, struct lu_dirent *ent); int (*lfsck_post)(const struct lu_env *env, struct lfsck_component *com, int result); int (*lfsck_dump)(const struct lu_env *env, struct lfsck_component *com, char *buf, int len); int (*lfsck_double_scan)(const struct lu_env *env, struct lfsck_component *com); }; struct lfsck_component { /* into md_lfsck::ml_list_(scan,double_scan,idle} */ cfs_list_t lc_link; /* into md_lfsck::ml_list_dir */ cfs_list_t lc_link_dir; struct rw_semaphore lc_sem; cfs_atomic_t lc_ref; struct lfsck_position lc_pos_start; struct md_lfsck *lc_lfsck; struct dt_object *lc_obj; struct lfsck_operations *lc_ops; void *lc_file_ram; void *lc_file_disk; __u32 lc_file_size; /* How many objects have been checked since last checkpoint. */ __u32 lc_new_checked; unsigned int lc_journal:1; __u16 lc_type; }; struct md_lfsck { struct mutex ml_mutex; spinlock_t ml_lock; /* For the components in (first) scanning via otable-based iteration. */ cfs_list_t ml_list_scan; /* For the components in scanning via directory traversal. Because * directory traversal cannot guarantee all the object be scanned, * so the component in the ml_list_dir must be in ml_list_scan. */ cfs_list_t ml_list_dir; /* For the components in double scanning. */ cfs_list_t ml_list_double_scan; /* For the components those are not scanning now. */ cfs_list_t ml_list_idle; struct ptlrpc_thread ml_thread; /* The time for last checkpoint, jiffies */ cfs_time_t ml_time_last_checkpoint; /* The time for next checkpoint, jiffies */ cfs_time_t ml_time_next_checkpoint; struct dt_object *ml_bookmark_obj; struct lfsck_bookmark ml_bookmark_ram; struct lfsck_bookmark ml_bookmark_disk; struct lfsck_position ml_pos_current; /* Obj for otable-based iteration */ struct dt_object *ml_obj_oit; /* Obj for directory traversal */ struct dt_object *ml_obj_dir; /* It for otable-based iteration */ struct dt_it *ml_di_oit; /* It for directory traversal */ struct dt_it *ml_di_dir; /* Arguments for low layer otable-based iteration. */ __u32 ml_args_oit; /* Arugments for namespace-based directory traversal. */ __u32 ml_args_dir; /* Schedule for every N objects. */ __u32 ml_sleep_rate; /* Sleep N jiffies for each schedule. */ __u32 ml_sleep_jif; /* How many objects have been scanned since last sleep. */ __u32 ml_new_scanned; unsigned int ml_paused:1, /* The lfsck is paused. */ ml_oit_over:1, /* oit is finished. */ ml_drop_dryrun:1, /* Ever dryrun, not now. */ ml_initialized:1; /* lfsck_setup is called. */ }; #endif /* _MDD_LFSCK_H */