+/*
+ * 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 Whamcloud, Inc.
+ */
+/*
+ * lustre/osd-ldiskfs/osd_scrub.c
+ *
+ * Top-level entry points into osd module
+ *
+ * The OI scrub is used for rebuilding Object Index files when restores MDT from
+ * file-level backup.
+ *
+ * The otable based iterator scans ldiskfs inode table to feed up layer LFSCK.
+ *
+ * Author: Fan Yong <yong.fan@whamcloud.com>
+ */
+
+#ifndef EXPORT_SYMTAB
+# define EXPORT_SYMTAB
+#endif
+#define DEBUG_SUBSYSTEM S_MDS
+
+#include <lustre/lustre_idl.h>
+#include <lustre_disk.h>
+#include <dt_object.h>
+
+#include "osd_internal.h"
+#include "osd_oi.h"
+#include "osd_scrub.h"
+
+#define HALF_SEC (CFS_HZ >> 1)
+
+static inline struct osd_device *osd_scrub2dev(struct osd_scrub *scrub)
+{
+ return container_of0(scrub, struct osd_device, od_scrub);
+}
+
+static inline struct super_block *osd_scrub2sb(struct osd_scrub *scrub)
+{
+ return osd_sb(osd_scrub2dev(scrub));
+}
+
+static void osd_scrub_file_to_cpu(struct scrub_file *des,
+ struct scrub_file *src)
+{
+ memcpy(des->sf_uuid, src->sf_uuid, 16);
+ des->sf_flags = le64_to_cpu(src->sf_flags);
+ des->sf_magic = le32_to_cpu(src->sf_magic);
+ des->sf_status = le16_to_cpu(src->sf_status);
+ des->sf_param = le16_to_cpu(src->sf_param);
+ des->sf_time_last_complete =
+ le64_to_cpu(src->sf_time_last_complete);
+ des->sf_time_latest_start =
+ le64_to_cpu(src->sf_time_latest_start);
+ des->sf_time_last_checkpoint =
+ le64_to_cpu(src->sf_time_last_checkpoint);
+ des->sf_pos_latest_start =
+ le64_to_cpu(src->sf_pos_latest_start);
+ des->sf_pos_last_checkpoint =
+ le64_to_cpu(src->sf_pos_last_checkpoint);
+ des->sf_pos_first_inconsistent =
+ le64_to_cpu(src->sf_pos_first_inconsistent);
+ des->sf_items_checked =
+ le64_to_cpu(src->sf_items_checked);
+ des->sf_items_updated =
+ le64_to_cpu(src->sf_items_updated);
+ des->sf_items_failed =
+ le64_to_cpu(src->sf_items_failed);
+ des->sf_items_updated_prior =
+ le64_to_cpu(src->sf_items_updated_prior);
+ des->sf_run_time = le32_to_cpu(src->sf_run_time);
+ des->sf_success_count = le32_to_cpu(src->sf_success_count);
+ des->sf_oi_count = le16_to_cpu(src->sf_oi_count);
+ memcpy(des->sf_oi_bitmap, src->sf_oi_bitmap, SCRUB_OI_BITMAP_SIZE);
+}
+
+static void osd_scrub_file_to_le(struct scrub_file *des,
+ struct scrub_file *src)
+{
+ memcpy(des->sf_uuid, src->sf_uuid, 16);
+ des->sf_flags = cpu_to_le64(src->sf_flags);
+ des->sf_magic = cpu_to_le32(src->sf_magic);
+ des->sf_status = cpu_to_le16(src->sf_status);
+ des->sf_param = cpu_to_le16(src->sf_param);
+ des->sf_time_last_complete =
+ cpu_to_le64(src->sf_time_last_complete);
+ des->sf_time_latest_start =
+ cpu_to_le64(src->sf_time_latest_start);
+ des->sf_time_last_checkpoint =
+ cpu_to_le64(src->sf_time_last_checkpoint);
+ des->sf_pos_latest_start =
+ cpu_to_le64(src->sf_pos_latest_start);
+ des->sf_pos_last_checkpoint =
+ cpu_to_le64(src->sf_pos_last_checkpoint);
+ des->sf_pos_first_inconsistent =
+ cpu_to_le64(src->sf_pos_first_inconsistent);
+ des->sf_items_checked =
+ cpu_to_le64(src->sf_items_checked);
+ des->sf_items_updated =
+ cpu_to_le64(src->sf_items_updated);
+ des->sf_items_failed =
+ cpu_to_le64(src->sf_items_failed);
+ des->sf_items_updated_prior =
+ cpu_to_le64(src->sf_items_updated_prior);
+ des->sf_run_time = cpu_to_le32(src->sf_run_time);
+ des->sf_success_count = cpu_to_le32(src->sf_success_count);
+ des->sf_oi_count = cpu_to_le16(src->sf_oi_count);
+ memcpy(des->sf_oi_bitmap, src->sf_oi_bitmap, SCRUB_OI_BITMAP_SIZE);
+}
+
+static void osd_scrub_file_init(struct osd_scrub *scrub, __u8 *uuid)
+{
+ struct scrub_file *sf = &scrub->os_file;
+
+ memset(sf, 0, sizeof(*sf));
+ memcpy(sf->sf_uuid, uuid, 16);
+ sf->sf_magic = SCRUB_MAGIC_V1;
+ sf->sf_status = SS_INIT;
+}
+
+void osd_scrub_file_reset(struct osd_scrub *scrub, __u8 *uuid, __u64 flags)
+{
+ struct scrub_file *sf = &scrub->os_file;
+
+ CDEBUG(D_LFSCK, "Reset OI scrub file, flags = "LPX64"\n", flags);
+ memcpy(sf->sf_uuid, uuid, 16);
+ sf->sf_status = SS_INIT;
+ sf->sf_flags |= flags;
+ sf->sf_param = 0;
+ sf->sf_run_time = 0;
+ sf->sf_time_latest_start = 0;
+ sf->sf_time_last_checkpoint = 0;
+ sf->sf_pos_latest_start = 0;
+ sf->sf_pos_last_checkpoint = 0;
+ sf->sf_pos_first_inconsistent = 0;
+ sf->sf_items_checked = 0;
+ sf->sf_items_updated = 0;
+ sf->sf_items_failed = 0;
+ sf->sf_items_updated_prior = 0;
+}
+
+static int osd_scrub_file_load(struct osd_scrub *scrub)
+{
+ loff_t pos = 0;
+ char *name = LDISKFS_SB(osd_scrub2sb(scrub))->s_es->s_volume_name;
+ int len = sizeof(scrub->os_file_disk);
+ int rc;
+
+ rc = osd_ldiskfs_read(scrub->os_inode, &scrub->os_file_disk, len, &pos);
+ if (rc == len) {
+ struct scrub_file *sf = &scrub->os_file;
+
+ osd_scrub_file_to_cpu(sf, &scrub->os_file_disk);
+ if (sf->sf_magic != SCRUB_MAGIC_V1) {
+ CWARN("%.16s: invalid scrub magic 0x%x != 0x%x\n,",
+ name, sf->sf_magic, SCRUB_MAGIC_V1);
+ /* Process it as new scrub file. */
+ rc = -ENOENT;
+ } else {
+ rc = 0;
+ }
+ } else if (rc != 0) {
+ CERROR("%.16s: fail to load scrub file, expected = %d, "
+ "rc = %d\n", name, len, rc);
+ if (rc > 0)
+ rc = -EFAULT;
+ } else {
+ /* return -ENOENT for empty scrub file case. */
+ rc = -ENOENT;
+ }
+
+ return rc;
+}
+
+int osd_scrub_file_store(struct osd_scrub *scrub)
+{
+ struct osd_device *dev;
+ handle_t *jh;
+ loff_t pos = 0;
+ int len = sizeof(scrub->os_file_disk);
+ int credits;
+ int rc;
+
+ dev = container_of0(scrub, struct osd_device, od_scrub);
+ credits = osd_dto_credits_noquota[DTO_WRITE_BASE] +
+ osd_dto_credits_noquota[DTO_WRITE_BLOCK];
+ jh = ldiskfs_journal_start_sb(osd_sb(dev), credits);
+ if (IS_ERR(jh)) {
+ rc = PTR_ERR(jh);
+ CERROR("%.16s: fail to start trans for scrub store, rc = %d\n",
+ LDISKFS_SB(osd_scrub2sb(scrub))->s_es->s_volume_name,rc);
+ return rc;
+ }
+
+ osd_scrub_file_to_le(&scrub->os_file_disk, &scrub->os_file);
+ rc = osd_ldiskfs_write_record(scrub->os_inode, &scrub->os_file_disk,
+ len, &pos, jh);
+ ldiskfs_journal_stop(jh);
+ if (rc != 0)
+ CERROR("%.16s: fail to store scrub file, expected = %d, "
+ "rc = %d\n",
+ LDISKFS_SB(osd_scrub2sb(scrub))->s_es->s_volume_name,
+ len, rc);
+ scrub->os_time_last_checkpoint = cfs_time_current();
+ scrub->os_time_next_checkpoint = scrub->os_time_last_checkpoint +
+ cfs_time_seconds(SCRUB_CHECKPOINT_INTERVAL);
+ return rc;
+}
+
+static int osd_scrub_prep(struct osd_device *dev)
+{
+ struct osd_scrub *scrub = &dev->od_scrub;
+ struct ptlrpc_thread *thread = &scrub->os_thread;
+ struct scrub_file *sf = &scrub->os_file;
+ __u32 flags = scrub->os_start_flags;
+ int rc;
+ ENTRY;
+
+ cfs_down_write(&scrub->os_rwsem);
+ if (flags & SS_SET_FAILOUT)
+ sf->sf_param |= SP_FAILOUT;
+
+ if (flags & SS_CLEAR_FAILOUT)
+ sf->sf_param &= ~SP_FAILOUT;
+
+ if (flags & SS_RESET)
+ osd_scrub_file_reset(scrub,
+ LDISKFS_SB(osd_sb(dev))->s_es->s_uuid, sf->sf_flags);
+
+ if (flags & SS_AUTO) {
+ scrub->os_full_speed = 1;
+ sf->sf_flags |= SF_AUTO;
+ } else {
+ scrub->os_full_speed = 0;
+ }
+
+ if (sf->sf_flags & (SF_RECREATED | SF_INCONSISTENT))
+ scrub->os_full_speed = 1;
+
+ scrub->os_in_prior = 0;
+ scrub->os_waiting = 0;
+ scrub->os_new_checked = 0;
+ if (sf->sf_pos_last_checkpoint != 0)
+ sf->sf_pos_latest_start = sf->sf_pos_last_checkpoint + 1;
+ else
+ sf->sf_pos_latest_start = LDISKFS_FIRST_INO(osd_sb(dev));
+
+ scrub->os_pos_current = sf->sf_pos_latest_start;
+ sf->sf_status = SS_SCANNING;
+ sf->sf_time_latest_start = cfs_time_current_sec();
+ sf->sf_time_last_checkpoint = sf->sf_time_latest_start;
+ rc = osd_scrub_file_store(scrub);
+ if (rc == 0) {
+ cfs_spin_lock(&scrub->os_lock);
+ thread_set_flags(thread, SVC_RUNNING);
+ cfs_spin_unlock(&scrub->os_lock);
+ cfs_waitq_broadcast(&thread->t_ctl_waitq);
+ }
+ cfs_up_write(&scrub->os_rwsem);
+
+ RETURN(rc);
+}
+
+static int osd_scrub_error_handler(struct osd_device *dev,
+ struct osd_inode_id *lid, int rc)
+{
+ struct osd_scrub *scrub = &dev->od_scrub;
+ struct scrub_file *sf = &scrub->os_file;
+
+ cfs_down_write(&scrub->os_rwsem);
+ scrub->os_new_checked++;
+ sf->sf_items_failed++;
+ if (sf->sf_pos_first_inconsistent == 0 ||
+ sf->sf_pos_first_inconsistent > lid->oii_ino)
+ sf->sf_pos_first_inconsistent = lid->oii_ino;
+ cfs_up_write(&scrub->os_rwsem);
+ return sf->sf_param & SP_FAILOUT ? rc : 0;
+}
+
+static int
+osd_scrub_check_update(struct osd_thread_info *info, struct osd_device *dev,
+ struct osd_idmap_cache *oic)
+{
+ struct osd_scrub *scrub = &dev->od_scrub;
+ struct scrub_file *sf = &scrub->os_file;
+ struct osd_inode_id *lid2 = &info->oti_id;
+ struct lu_fid *oi_fid = &info->oti_fid;
+ struct osd_inode_id *oi_id = &info->oti_id;
+ handle_t *jh = NULL;
+ struct osd_inconsistent_item *oii = NULL;
+ struct inode *inode = NULL;
+ struct lu_fid *fid = &oic->oic_fid;
+ struct osd_inode_id *lid = &oic->oic_lid;
+ struct iam_container *bag;
+ struct iam_path_descr *ipd;
+ int ops = DTO_INDEX_UPDATE;
+ int idx;
+ int rc;
+ ENTRY;
+
+ if (scrub->os_in_prior)
+ oii = cfs_list_entry(oic, struct osd_inconsistent_item,
+ oii_cache);
+
+ cfs_down_write(&scrub->os_rwsem);
+ scrub->os_new_checked++;
+ if (lid->oii_ino < sf->sf_pos_latest_start && oii == NULL)
+ GOTO(out, rc = 0);
+
+ if (oii != NULL && oii->oii_insert)
+ goto iget;
+
+ rc = osd_oi_lookup(info, dev, fid, lid2);
+ if (rc != 0) {
+ if (rc != -ENOENT)
+ GOTO(out, rc);
+
+iget:
+ inode = osd_iget(info, dev, lid);
+ if (IS_ERR(inode)) {
+ rc = PTR_ERR(inode);
+ /* Someone removed the inode. */
+ if (rc == -ENOENT || rc == -ESTALE)
+ rc = 0;
+ GOTO(out, rc);
+ }
+
+ /* Prevent the inode to be unlinked during OI scrub. */
+ cfs_mutex_lock(&inode->i_mutex);
+ if (unlikely(inode->i_nlink == 0)) {
+ cfs_mutex_unlock(&inode->i_mutex);
+ iput(inode);
+ GOTO(out, rc = 0);
+ }
+
+ ops = DTO_INDEX_INSERT;
+ idx = osd_oi_fid2idx(dev, fid);
+ if (unlikely(!ldiskfs_test_bit(idx, sf->sf_oi_bitmap)))
+ ldiskfs_set_bit(idx, sf->sf_oi_bitmap);
+ sf->sf_flags |= SF_RECREATED;
+ } else if (osd_id_eq(lid, lid2)) {
+ GOTO(out, rc = 0);
+ }
+
+ sf->sf_flags |= SF_INCONSISTENT;
+ fid_cpu_to_be(oi_fid, fid);
+ osd_id_pack(oi_id, &oic->oic_lid);
+ jh = ldiskfs_journal_start_sb(osd_sb(dev),
+ osd_dto_credits_noquota[ops]);
+ if (IS_ERR(jh)) {
+ rc = PTR_ERR(jh);
+ CERROR("%.16s: fail to start trans for scrub store, rc = %d\n",
+ LDISKFS_SB(osd_sb(dev))->s_es->s_volume_name, rc);
+ GOTO(out, rc);
+ }
+
+ bag = &osd_fid2oi(dev, fid)->oi_dir.od_container;
+ ipd = osd_idx_ipd_get(info->oti_env, bag);
+ if (unlikely(ipd == NULL)) {
+ ldiskfs_journal_stop(jh);
+ CERROR("%.16s: fail to get ipd for scrub store\n",
+ LDISKFS_SB(osd_sb(dev))->s_es->s_volume_name);
+ GOTO(out, rc = -ENOMEM);
+ }
+
+ if (ops == DTO_INDEX_UPDATE)
+ rc = iam_update(jh, bag, (const struct iam_key *)oi_fid,
+ (struct iam_rec *)oi_id, ipd);
+ else
+ rc = iam_insert(jh, bag, (const struct iam_key *)oi_fid,
+ (struct iam_rec *)oi_id, ipd);
+ osd_ipd_put(info->oti_env, bag, ipd);
+ ldiskfs_journal_stop(jh);
+ if (rc == 0) {
+ if (scrub->os_in_prior)
+ sf->sf_items_updated_prior++;
+ else
+ sf->sf_items_updated++;
+ }
+
+ GOTO(out, rc);
+
+out:
+ if (rc != 0) {
+ sf->sf_items_failed++;
+ if (sf->sf_pos_first_inconsistent == 0 ||
+ sf->sf_pos_first_inconsistent > lid->oii_ino)
+ sf->sf_pos_first_inconsistent = lid->oii_ino;
+ }
+
+ if (ops == DTO_INDEX_INSERT) {
+ cfs_mutex_unlock(&inode->i_mutex);
+ iput(inode);
+ }
+ cfs_up_write(&scrub->os_rwsem);
+
+ if (oii != NULL) {
+ LASSERT(!cfs_list_empty(&oii->oii_list));
+
+ cfs_spin_lock(&scrub->os_lock);
+ cfs_list_del_init(&oii->oii_list);
+ cfs_spin_unlock(&scrub->os_lock);
+ OBD_FREE_PTR(oii);
+ }
+ RETURN(sf->sf_param & SP_FAILOUT ? rc : 0);
+}
+
+static int do_osd_scrub_checkpoint(struct osd_scrub *scrub)
+{
+ struct scrub_file *sf = &scrub->os_file;
+ int rc;
+ ENTRY;
+
+ cfs_down_write(&scrub->os_rwsem);
+ sf->sf_items_checked += scrub->os_new_checked;
+ scrub->os_new_checked = 0;
+ sf->sf_pos_last_checkpoint = scrub->os_pos_current;
+ sf->sf_time_last_checkpoint = cfs_time_current_sec();
+ sf->sf_run_time += cfs_duration_sec(cfs_time_current() + HALF_SEC -
+ scrub->os_time_last_checkpoint);
+ rc = osd_scrub_file_store(scrub);
+ cfs_up_write(&scrub->os_rwsem);
+
+ RETURN(rc);
+}
+
+static inline int osd_scrub_checkpoint(struct osd_scrub *scrub)
+{
+ if (unlikely(cfs_time_beforeq(scrub->os_time_next_checkpoint,
+ cfs_time_current()) &&
+ scrub->os_new_checked > 0))
+ return do_osd_scrub_checkpoint(scrub);
+ return 0;
+}
+
+static void osd_scrub_post(struct osd_scrub *scrub, int result)
+{
+ struct scrub_file *sf = &scrub->os_file;
+ ENTRY;
+
+ cfs_down_write(&scrub->os_rwsem);
+ cfs_spin_lock(&scrub->os_lock);
+ thread_set_flags(&scrub->os_thread, SVC_STOPPING);
+ cfs_spin_unlock(&scrub->os_lock);
+ if (scrub->os_new_checked > 0) {
+ sf->sf_items_checked += scrub->os_new_checked;
+ scrub->os_new_checked = 0;
+ sf->sf_pos_last_checkpoint = scrub->os_pos_current;
+ }
+ sf->sf_time_last_checkpoint = cfs_time_current_sec();
+ if (result > 0) {
+ sf->sf_status = SS_COMPLETED;
+ memset(sf->sf_oi_bitmap, 0, SCRUB_OI_BITMAP_SIZE);
+ sf->sf_flags &= ~(SF_RECREATED | SF_INCONSISTENT | SF_AUTO);
+ sf->sf_time_last_complete = sf->sf_time_last_checkpoint;
+ sf->sf_success_count++;
+ } else if (result == 0) {
+ sf->sf_status = SS_PAUSED;
+ } else {
+ sf->sf_status = SS_FAILED;
+ }
+ sf->sf_run_time += cfs_duration_sec(cfs_time_current() + HALF_SEC -
+ scrub->os_time_last_checkpoint);
+ result = osd_scrub_file_store(scrub);
+ if (result < 0)
+ CERROR("%.16s: fail to osd_scrub_post, rc = %d\n",
+ LDISKFS_SB(osd_scrub2sb(scrub))->s_es->s_volume_name,
+ result);
+ cfs_up_write(&scrub->os_rwsem);
+
+ EXIT;
+}
+
+#define SCRUB_NEXT_BREAK 1
+#define SCRUB_NEXT_CONTINUE 2
+
+static int
+osd_scrub_next(struct osd_thread_info *info, struct osd_device *dev,
+ struct osd_scrub *scrub, struct super_block *sb,
+ ldiskfs_group_t bg, struct buffer_head *bitmap, __u32 gbase,
+ __u32 *offset, struct osd_idmap_cache **oic)
+{
+ struct osd_inconsistent_item *oii;
+ struct lu_fid *fid;
+ struct osd_inode_id *lid;
+ struct inode *inode;
+ int rc = 0;
+
+ if (!cfs_list_empty(&scrub->os_inconsistent_items)) {
+ oii = cfs_list_entry(scrub->os_inconsistent_items.next,
+ struct osd_inconsistent_item, oii_list);
+ *oic = &oii->oii_cache;
+ scrub->os_in_prior = 1;
+ return 0;
+ }
+
+ *oic = &scrub->os_oic;
+ fid = &(*oic)->oic_fid;
+ lid = &(*oic)->oic_lid;
+ *offset = ldiskfs_find_next_bit(bitmap->b_data,
+ LDISKFS_INODES_PER_GROUP(sb), *offset);
+ if (*offset >= LDISKFS_INODES_PER_GROUP(sb)) {
+ brelse(bitmap);
+ scrub->os_pos_current = 1 + (bg + 1) *
+ LDISKFS_INODES_PER_GROUP(sb);
+ return SCRUB_NEXT_BREAK;
+ }
+
+ scrub->os_pos_current = gbase + *offset;
+ osd_id_gen(lid, scrub->os_pos_current, OSD_OII_NOGEN);
+ inode = osd_iget_fid(info, dev, lid, fid);
+ if (IS_ERR(inode)) {
+ rc = PTR_ERR(inode);
+ /* The inode may be removed after bitmap searching, or the
+ * file is new created without inode initialized yet. */
+ if (rc == -ENOENT || rc == -ESTALE)
+ rc = SCRUB_NEXT_CONTINUE;
+ else
+ CERROR("%.16s: fail to read inode, group = %u, "
+ "ino# = %u, rc = %d\n",
+ LDISKFS_SB(sb)->s_es->s_volume_name,
+ bg, scrub->os_pos_current, rc);
+ } else {
+ if (fid_is_igif(fid) || fid_is_idif(fid) ||
+ fid_seq(fid) == FID_SEQ_LLOG ||
+ fid_seq(fid) == FID_SEQ_LOCAL_FILE ||
+ fid_seq_is_rsvd(fid_seq(fid)) ||
+ inode->i_state & I_LUSTRE_NOSCRUB)
+ rc = SCRUB_NEXT_CONTINUE;
+ iput(inode);
+ }
+ return rc;
+}
+
+static inline int osd_scrub_has_window(struct osd_scrub *scrub,
+ struct osd_otable_cache *ooc)
+{
+ return scrub->os_pos_current < ooc->ooc_pos_preload + SCRUB_WINDOW_SIZE;
+}
+
+static int osd_scrub_main(void *args)
+{
+ struct lu_env env;
+ struct osd_thread_info *info;
+ struct osd_device *dev = (struct osd_device *)args;
+ struct osd_scrub *scrub = &dev->od_scrub;
+ struct ptlrpc_thread *thread = &scrub->os_thread;
+ cfs_list_t *list = &scrub->os_inconsistent_items;
+ struct l_wait_info lwi = { 0 };
+ struct super_block *sb = osd_sb(dev);
+ struct osd_otable_it *it = NULL;
+ struct osd_otable_cache *ooc = NULL;
+ int noslot = 0;
+ int rc;
+ __u32 max;
+ ENTRY;
+
+ cfs_daemonize("OI_scrub");
+ rc = lu_env_init(&env, LCT_DT_THREAD);
+ if (rc != 0) {
+ CERROR("%.16s: OI scrub, fail to init env, rc = %d\n",
+ LDISKFS_SB(sb)->s_es->s_volume_name, rc);
+ GOTO(noenv, rc);
+ }
+
+ info = osd_oti_get(&env);
+ rc = osd_scrub_prep(dev);
+ if (rc != 0) {
+ CERROR("%.16s: OI scrub, fail to scrub prep, rc = %d\n",
+ LDISKFS_SB(sb)->s_es->s_volume_name, rc);
+ GOTO(out, rc);
+ }
+
+ if (!scrub->os_full_speed) {
+ LASSERT(dev->od_otable_it != NULL);
+
+ it = dev->od_otable_it;
+ ooc = &it->ooi_cache;
+ l_wait_event(thread->t_ctl_waitq,
+ it->ooi_user_ready || !thread_is_running(thread),
+ &lwi);
+ if (unlikely(!thread_is_running(thread)))
+ GOTO(post, rc = 0);
+
+ LASSERT(scrub->os_pos_current >= ooc->ooc_pos_preload);
+ scrub->os_pos_current = ooc->ooc_pos_preload;
+ }
+
+ CDEBUG(D_LFSCK, "OI scrub: flags = 0x%x, pos = %u\n",
+ scrub->os_start_flags, scrub->os_pos_current);
+
+ max = le32_to_cpu(LDISKFS_SB(sb)->s_es->s_inodes_count);
+ while (scrub->os_pos_current <= max) {
+ struct buffer_head *bitmap = NULL;
+ struct osd_idmap_cache *oic = NULL;
+ ldiskfs_group_t bg = (scrub->os_pos_current - 1) /
+ LDISKFS_INODES_PER_GROUP(sb);
+ __u32 offset = (scrub->os_pos_current - 1) %
+ LDISKFS_INODES_PER_GROUP(sb);
+ __u32 gbase = 1 + bg * LDISKFS_INODES_PER_GROUP(sb);
+
+ bitmap = ldiskfs_read_inode_bitmap(sb, bg);
+ if (bitmap == NULL) {
+ CERROR("%.16s: fail to read bitmap at pos = %u, "
+ "bg = %u, scrub will stop\n",
+ LDISKFS_SB(sb)->s_es->s_volume_name,
+ scrub->os_pos_current, (__u32)bg);
+ GOTO(post, rc = -EIO);
+ }
+
+ while (offset < LDISKFS_INODES_PER_GROUP(sb)) {
+ if (unlikely(!thread_is_running(thread))) {
+ brelse(bitmap);
+ GOTO(post, rc = 0);
+ }
+
+ if (cfs_list_empty(list) && noslot != 0)
+ goto wait;
+
+ rc = osd_scrub_next(info, dev, scrub, sb, bg,
+ bitmap, gbase, &offset, &oic);
+ if (rc == SCRUB_NEXT_BREAK)
+ break;
+ else if (rc == SCRUB_NEXT_CONTINUE)
+ goto next;
+
+ if (rc != 0)
+ rc = osd_scrub_error_handler(dev, &oic->oic_lid,
+ rc);
+ else
+ rc = osd_scrub_check_update(info, dev, oic);
+ if (rc != 0) {
+ brelse(bitmap);
+ GOTO(post, rc);
+ }
+
+ rc = osd_scrub_checkpoint(scrub);
+ if (rc != 0) {
+ CERROR("%.16s: fail to checkpoint, pos = %u, "
+ "rc = %d\n",
+ LDISKFS_SB(sb)->s_es->s_volume_name,
+ scrub->os_pos_current, rc);
+ brelse(bitmap);
+ GOTO(post, rc);
+ }
+
+ if (scrub->os_in_prior) {
+ scrub->os_in_prior = 0;
+ continue;
+ }
+
+next:
+ scrub->os_pos_current = gbase + ++offset;
+ if (dev->od_otable_it != NULL) {
+ if (unlikely(it == NULL)) {
+ it = dev->od_otable_it;
+ ooc = &it->ooi_cache;
+ }
+
+ if (it->ooi_waiting &&
+ (ooc->ooc_pos_preload <
+ scrub->os_pos_current)) {
+ it->ooi_waiting = 0;
+ cfs_waitq_broadcast(
+ &thread->t_ctl_waitq);
+ }
+ }
+
+ if (scrub->os_full_speed || rc == SCRUB_NEXT_CONTINUE)
+ continue;
+
+wait:
+ if (osd_scrub_has_window(scrub, ooc)) {
+ noslot = 0;
+ continue;
+ }
+
+ scrub->os_waiting = 1;
+ l_wait_event(thread->t_ctl_waitq,
+ osd_scrub_has_window(scrub, ooc) ||
+ !cfs_list_empty(list) ||
+ !thread_is_running(thread),
+ &lwi);
+ scrub->os_waiting = 0;
+
+ if (osd_scrub_has_window(scrub, ooc))
+ noslot = 0;
+ else
+ noslot = 1;
+ }
+ }
+
+ GOTO(post, rc = (scrub->os_pos_current > max ? 1 : rc));
+
+post:
+ osd_scrub_post(scrub, rc);
+ CDEBUG(D_LFSCK, "OI scrub: stop, rc = %d, pos = %u\n",
+ rc, scrub->os_pos_current);
+
+out:
+ while (!cfs_list_empty(list)) {
+ struct osd_inconsistent_item *oii;
+
+ oii = cfs_list_entry(list->next,
+ struct osd_inconsistent_item, oii_list);
+ cfs_list_del_init(&oii->oii_list);
+ OBD_FREE_PTR(oii);
+ }
+ lu_env_fini(&env);
+
+noenv:
+ cfs_spin_lock(&scrub->os_lock);
+ thread_set_flags(thread, SVC_STOPPED);
+ cfs_waitq_broadcast(&thread->t_ctl_waitq);
+ cfs_spin_unlock(&scrub->os_lock);
+ return rc;
+}
+
+static int do_osd_scrub_start(struct osd_device *dev, __u32 flags)
+{
+ struct osd_scrub *scrub = &dev->od_scrub;
+ struct ptlrpc_thread *thread = &scrub->os_thread;
+ struct l_wait_info lwi = { 0 };
+ int rc;
+ ENTRY;
+
+again:
+ /* os_lock: sync status between stop and scrub thread */
+ cfs_spin_lock(&scrub->os_lock);
+ if (thread_is_running(thread)) {
+ cfs_spin_unlock(&scrub->os_lock);
+ RETURN(-EALREADY);
+ } else if (unlikely(thread_is_stopping(thread))) {
+ cfs_spin_unlock(&scrub->os_lock);
+ l_wait_event(thread->t_ctl_waitq,
+ thread_is_stopped(thread),
+ &lwi);
+ goto again;
+ }
+ cfs_spin_unlock(&scrub->os_lock);
+
+ scrub->os_start_flags = flags;
+ thread_set_flags(thread, 0);
+ rc = cfs_create_thread(osd_scrub_main, dev, 0);
+ if (rc < 0) {
+ CERROR("%.16s: cannot start iteration thread, rc = %d\n",
+ LDISKFS_SB(osd_sb(dev))->s_es->s_volume_name, rc);
+ RETURN(rc);
+ }
+
+ l_wait_event(thread->t_ctl_waitq,
+ thread_is_running(thread) || thread_is_stopped(thread),
+ &lwi);
+
+ RETURN(0);
+}
+
+int osd_scrub_start(struct osd_device *dev)
+{
+ __u32 flags = SS_AUTO;
+ int rc;
+ ENTRY;
+
+ if (dev->od_scrub.os_file.sf_status == SS_COMPLETED)
+ flags |= SS_RESET;
+
+ /* od_otable_mutex: prevent curcurrent start/stop */
+ cfs_mutex_lock(&dev->od_otable_mutex);
+ rc = do_osd_scrub_start(dev, flags);
+ cfs_mutex_unlock(&dev->od_otable_mutex);
+
+ RETURN(rc == -EALREADY ? 0 : rc);
+}
+
+static void do_osd_scrub_stop(struct osd_scrub *scrub)
+{
+ struct ptlrpc_thread *thread = &scrub->os_thread;
+ struct l_wait_info lwi = { 0 };
+
+ /* os_lock: sync status between stop and scrub thread */
+ cfs_spin_lock(&scrub->os_lock);
+ if (!thread_is_init(thread) && !thread_is_stopped(thread)) {
+ thread_set_flags(thread, SVC_STOPPING);
+ cfs_spin_unlock(&scrub->os_lock);
+ cfs_waitq_broadcast(&thread->t_ctl_waitq);
+ l_wait_event(thread->t_ctl_waitq,
+ thread_is_stopped(thread),
+ &lwi);
+ /* Do not skip the last lock/unlock, which can guarantee that
+ * the caller cannot return until the OI scrub thread exit. */
+ cfs_spin_lock(&scrub->os_lock);
+ }
+ cfs_spin_unlock(&scrub->os_lock);
+}
+
+static void osd_scrub_stop(struct osd_device *dev)
+{
+ /* od_otable_mutex: prevent curcurrent start/stop */
+ cfs_mutex_lock(&dev->od_otable_mutex);
+ do_osd_scrub_stop(&dev->od_scrub);
+ cfs_mutex_unlock(&dev->od_otable_mutex);
+}
+
+static const char osd_scrub_name[] = "OI_scrub";
+
+int osd_scrub_setup(const struct lu_env *env, struct osd_device *dev)
+{
+ struct osd_thread_info *info = osd_oti_get(env);
+ struct osd_scrub *scrub = &dev->od_scrub;
+ struct lvfs_run_ctxt *ctxt = &scrub->os_ctxt;
+ struct scrub_file *sf = &scrub->os_file;
+ struct osd_inode_id *id = &scrub->os_oic.oic_lid;
+ struct super_block *sb = osd_sb(dev);
+ struct ldiskfs_super_block *es = LDISKFS_SB(sb)->s_es;
+ struct inode *inode;
+ struct lvfs_run_ctxt saved;
+ struct file *filp;
+ int dirty = 0;
+ int init = 0;
+ int rc = 0;
+ ENTRY;
+
+ OBD_SET_CTXT_MAGIC(ctxt);
+ ctxt->pwdmnt = dev->od_mnt;
+ ctxt->pwd = dev->od_mnt->mnt_root;
+ ctxt->fs = get_ds();
+
+ cfs_waitq_init(&scrub->os_thread.t_ctl_waitq);
+ cfs_init_rwsem(&scrub->os_rwsem);
+ cfs_spin_lock_init(&scrub->os_lock);
+ CFS_INIT_LIST_HEAD(&scrub->os_inconsistent_items);
+ if (get_mount_flags(dev->od_mount->lmi_sb) & LMD_FLG_NOSCRUB)
+ scrub->os_no_scrub = 1;
+
+ push_ctxt(&saved, ctxt, NULL);
+ filp = filp_open(osd_scrub_name, O_RDWR | O_CREAT, 0644);
+ if (IS_ERR(filp))
+ RETURN(PTR_ERR(filp));
+
+ scrub->os_inode = igrab(filp->f_dentry->d_inode);
+ filp_close(filp, 0);
+ pop_ctxt(&saved, ctxt, NULL);
+
+ rc = osd_scrub_file_load(scrub);
+ if (rc == -ENOENT) {
+ osd_scrub_file_init(scrub, es->s_uuid);
+ dirty = 1;
+ init = 1;
+ } else if (rc != 0) {
+ RETURN(rc);
+ } else {
+ if (memcmp(sf->sf_uuid, es->s_uuid, 16) != 0) {
+ osd_scrub_file_reset(scrub, es->s_uuid,SF_INCONSISTENT);
+ dirty = 1;
+ } else if (sf->sf_status == SS_SCANNING) {
+ sf->sf_status = SS_CRASHED;
+ dirty = 1;
+ }
+ }
+
+ if (sf->sf_pos_last_checkpoint != 0)
+ scrub->os_pos_current = sf->sf_pos_last_checkpoint + 1;
+ else
+ scrub->os_pos_current = LDISKFS_FIRST_INO(sb);
+
+ if (dirty != 0) {
+ rc = osd_scrub_file_store(scrub);
+ if (rc != 0)
+ RETURN(rc);
+ }
+
+ /* Initialize OI files. */
+ rc = osd_oi_init(info, dev);
+ if (rc < 0)
+ RETURN(rc);
+
+ if (init != 0) {
+ rc = __osd_oi_lookup(info, dev, &LU_DOT_LUSTRE_FID, id);
+ if (rc == 0) {
+ inode = osd_iget(info, dev, id);
+ if (IS_ERR(inode)) {
+ rc = PTR_ERR(inode);
+ /* It is restored from old 2.x backup. */
+ if (rc == -ENOENT || rc == -ESTALE) {
+ osd_scrub_file_reset(scrub, es->s_uuid,
+ SF_INCONSISTENT);
+ rc = osd_scrub_file_store(scrub);
+ }
+ } else {
+ iput(inode);
+ }
+ } else if (rc == -ENOENT) {
+ rc = 0;
+ }
+ }
+
+ if (rc == 0 && !scrub->os_no_scrub &&
+ ((sf->sf_status == SS_CRASHED &&
+ sf->sf_flags & (SF_RECREATED | SF_INCONSISTENT | SF_AUTO)) ||
+ (sf->sf_status == SS_INIT &&
+ sf->sf_flags & (SF_RECREATED | SF_INCONSISTENT))))
+ rc = osd_scrub_start(dev);
+
+ RETURN(rc);
+}
+
+void osd_scrub_cleanup(const struct lu_env *env, struct osd_device *dev)
+{
+ struct osd_scrub *scrub = &dev->od_scrub;
+
+ LASSERT(dev->od_otable_it == NULL);
+
+ if (scrub->os_inode != NULL) {
+ osd_scrub_stop(dev);
+ iput(scrub->os_inode);
+ scrub->os_inode = NULL;
+ }
+ if (dev->od_oi_table != NULL)
+ osd_oi_fini(osd_oti_get(env), dev);
+}
git://git.whamcloud.com / fs / lustre-release.git / commitdiff