+/*
+ * 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 <fan.yong@intel.com>
+ */
+
+#ifndef _MDD_LFSCK_H
+# define _MDD_LFSCK_H
+
+#include <lustre/lustre_lfsck_user.h>
+
+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 */
git://git.whamcloud.com / fs / lustre-release.git / commitdiff