X-Git-Url: https://git.whamcloud.com/?p=fs%2Flustre-release.git;a=blobdiff_plain;f=lustre%2Fmdd%2Fmdd_lfsck.c;h=bd3f33172a8d84800708dd8078aead936842e99c;hp=6c697930e356adf7f13a2be3a1b0ee524d30ba5c;hb=c961228f1c30254c454ed1432ba83af3aa7c39b4;hpb=21b0820ab8b596ae4daf4a0a31e3725e52e0590a

diff --git a/lustre/mdd/mdd_lfsck.c b/lustre/mdd/mdd_lfsck.c
index 6c69793..bd3f331 100644
--- a/lustre/mdd/mdd_lfsck.c
+++ b/lustre/mdd/mdd_lfsck.c
@@ -40,21 +40,70 @@
 
 #include <lustre/lustre_idl.h>
 #include <lustre_fid.h>
+#include <obd_support.h>
 
 #include "mdd_internal.h"
+#include "mdd_lfsck.h"
+
+#define HALF_SEC			(CFS_HZ >> 1)
+#define LFSCK_CHECKPOINT_INTERVAL	60
+
+const char lfsck_bookmark_name[] = "lfsck_bookmark";
+
+/* misc functions */
+
+static inline struct mdd_device *mdd_lfsck2mdd(struct md_lfsck *lfsck)
+{
+	return container_of0(lfsck, struct mdd_device, mdd_lfsck);
+}
 
 static inline char *mdd_lfsck2name(struct md_lfsck *lfsck)
 {
-	struct mdd_device *mdd;
+	struct mdd_device *mdd = mdd_lfsck2mdd(lfsck);
 
-	mdd = container_of0(lfsck, struct mdd_device, mdd_lfsck);
 	return mdd2obd_dev(mdd)->obd_name;
 }
 
-void mdd_lfsck_set_speed(struct md_lfsck *lfsck, __u32 limit)
+static inline void mdd_lfsck_component_put(const struct lu_env *env,
+					   struct lfsck_component *com)
 {
-	spin_lock(&lfsck->ml_lock);
-	lfsck->ml_speed_limit = limit;
+	if (atomic_dec_and_test(&com->lc_ref)) {
+		if (com->lc_obj != NULL)
+			lu_object_put(env, &com->lc_obj->do_lu);
+		if (com->lc_file_ram != NULL)
+			OBD_FREE(com->lc_file_ram, com->lc_file_size);
+		if (com->lc_file_disk != NULL)
+			OBD_FREE(com->lc_file_disk, com->lc_file_size);
+		OBD_FREE_PTR(com);
+	}
+}
+
+static inline struct lfsck_component *
+__mdd_lfsck_component_find(struct md_lfsck *lfsck, __u16 type, cfs_list_t *list)
+{
+	struct lfsck_component *com;
+
+	cfs_list_for_each_entry(com, list, lc_link) {
+		if (com->lc_type == type)
+			return com;
+	}
+	return NULL;
+}
+
+static void mdd_lfsck_component_cleanup(const struct lu_env *env,
+					struct lfsck_component *com)
+{
+	if (!cfs_list_empty(&com->lc_link))
+		cfs_list_del_init(&com->lc_link);
+	if (!cfs_list_empty(&com->lc_link_dir))
+		cfs_list_del_init(&com->lc_link_dir);
+
+	mdd_lfsck_component_put(env, com);
+}
+
+static void __mdd_lfsck_set_speed(struct md_lfsck *lfsck, __u32 limit)
+{
+	lfsck->ml_bookmark_ram.lb_speed_limit = limit;
 	if (limit != LFSCK_SPEED_NO_LIMIT) {
 		if (limit > CFS_HZ) {
 			lfsck->ml_sleep_rate = limit / CFS_HZ;
@@ -67,7 +116,6 @@ void mdd_lfsck_set_speed(struct md_lfsck *lfsck, __u32 limit)
 		lfsck->ml_sleep_jif = 0;
 		lfsck->ml_sleep_rate = 0;
 	}
-	spin_unlock(&lfsck->ml_lock);
 }
 
 static void mdd_lfsck_control_speed(struct md_lfsck *lfsck)
@@ -94,12 +142,131 @@ static void mdd_lfsck_control_speed(struct md_lfsck *lfsck)
 	}
 }
 
+/* lfsck_bookmark file ops */
+
+static void inline mdd_lfsck_bookmark_to_cpu(struct lfsck_bookmark *des,
+					     struct lfsck_bookmark *src)
+{
+	des->lb_magic = le32_to_cpu(src->lb_magic);
+	des->lb_version = le16_to_cpu(src->lb_version);
+	des->lb_param = le16_to_cpu(src->lb_param);
+	des->lb_speed_limit = le32_to_cpu(src->lb_speed_limit);
+}
+
+static void inline mdd_lfsck_bookmark_to_le(struct lfsck_bookmark *des,
+					    struct lfsck_bookmark *src)
+{
+	des->lb_magic = cpu_to_le32(src->lb_magic);
+	des->lb_version = cpu_to_le16(src->lb_version);
+	des->lb_param = cpu_to_le16(src->lb_param);
+	des->lb_speed_limit = cpu_to_le32(src->lb_speed_limit);
+}
+
+static int mdd_lfsck_bookmark_load(const struct lu_env *env,
+				   struct md_lfsck *lfsck)
+{
+	loff_t pos = 0;
+	int    len = sizeof(struct lfsck_bookmark);
+	int    rc;
+
+	rc = dt_record_read(env, lfsck->ml_bookmark_obj,
+			    mdd_buf_get(env, &lfsck->ml_bookmark_disk, len),
+			    &pos);
+	if (rc == 0) {
+		struct lfsck_bookmark *bm = &lfsck->ml_bookmark_ram;
+
+		mdd_lfsck_bookmark_to_cpu(bm, &lfsck->ml_bookmark_disk);
+		if (bm->lb_magic != LFSCK_BOOKMARK_MAGIC) {
+			CWARN("%.16s: invalid lfsck_bookmark magic "
+			      "0x%x != 0x%x\n", mdd_lfsck2name(lfsck),
+			      bm->lb_magic, LFSCK_BOOKMARK_MAGIC);
+			/* Process it as new lfsck_bookmark. */
+			rc = -ENODATA;
+		}
+	} else {
+		if (rc == -EFAULT && pos == 0)
+			/* return -ENODATA for empty lfsck_bookmark. */
+			rc = -ENODATA;
+		else
+			CERROR("%.16s: fail to load lfsck_bookmark, "
+			       "expected = %d, rc = %d\n",
+			       mdd_lfsck2name(lfsck), len, rc);
+	}
+	return rc;
+}
+
+static int mdd_lfsck_bookmark_store(const struct lu_env *env,
+				    struct md_lfsck *lfsck)
+{
+	struct mdd_device *mdd    = mdd_lfsck2mdd(lfsck);
+	struct thandle    *handle;
+	struct dt_object  *obj    = lfsck->ml_bookmark_obj;
+	loff_t		   pos    = 0;
+	int		   len    = sizeof(struct lfsck_bookmark);
+	int		   rc;
+	ENTRY;
+
+	mdd_lfsck_bookmark_to_le(&lfsck->ml_bookmark_disk,
+				 &lfsck->ml_bookmark_ram);
+	handle = dt_trans_create(env, mdd->mdd_bottom);
+	if (IS_ERR(handle)) {
+		rc = PTR_ERR(handle);
+		CERROR("%.16s: fail to create trans for storing "
+		       "lfsck_bookmark: %d\n,", mdd_lfsck2name(lfsck), rc);
+		RETURN(rc);
+	}
+
+	rc = dt_declare_record_write(env, obj, len, 0, handle);
+	if (rc != 0) {
+		CERROR("%.16s: fail to declare trans for storing "
+		       "lfsck_bookmark: %d\n,", mdd_lfsck2name(lfsck), rc);
+		GOTO(out, rc);
+	}
+
+	rc = dt_trans_start_local(env, mdd->mdd_bottom, handle);
+	if (rc != 0) {
+		CERROR("%.16s: fail to start trans for storing "
+		       "lfsck_bookmark: %d\n,", mdd_lfsck2name(lfsck), rc);
+		GOTO(out, rc);
+	}
+
+	rc = dt_record_write(env, obj,
+			     mdd_buf_get(env, &lfsck->ml_bookmark_disk, len),
+			     &pos, handle);
+	if (rc != 0)
+		CERROR("%.16s: fail to store lfsck_bookmark, expected = %d, "
+		       "rc = %d\n", mdd_lfsck2name(lfsck), len, rc);
+
+	GOTO(out, rc);
+
+out:
+	dt_trans_stop(env, mdd->mdd_bottom, handle);
+	return rc;
+}
+
+static int mdd_lfsck_bookmark_init(const struct lu_env *env,
+				   struct md_lfsck *lfsck)
+{
+	struct lfsck_bookmark *mb = &lfsck->ml_bookmark_ram;
+	int rc;
+
+	memset(mb, 0, sizeof(mb));
+	mb->lb_magic = LFSCK_BOOKMARK_MAGIC;
+	mb->lb_version = LFSCK_VERSION_V1;
+	mutex_lock(&lfsck->ml_mutex);
+	rc = mdd_lfsck_bookmark_store(env, lfsck);
+	mutex_unlock(&lfsck->ml_mutex);
+	return rc;
+}
+
+/* LFSCK engines */
+
 static int mdd_lfsck_main(void *args)
 {
 	struct lu_env		 env;
 	struct md_lfsck		*lfsck  = (struct md_lfsck *)args;
 	struct ptlrpc_thread	*thread = &lfsck->ml_thread;
-	struct dt_object	*obj    = lfsck->ml_it_obj;
+	struct dt_object	*obj    = lfsck->ml_obj_oit;
 	const struct dt_it_ops	*iops   = &obj->do_index_ops->dio_it;
 	struct dt_it		*di;
 	struct lu_fid		*fid;
@@ -114,7 +281,7 @@ static int mdd_lfsck_main(void *args)
 		GOTO(noenv, rc);
 	}
 
-	di = iops->init(&env, obj, lfsck->ml_args, BYPASS_CAPA);
+	di = iops->init(&env, obj, lfsck->ml_args_oit, BYPASS_CAPA);
 	if (IS_ERR(di)) {
 		rc = PTR_ERR(di);
 		CERROR("%s: LFSCK, fail to init iteration, rc = %d\n",
@@ -123,7 +290,7 @@ static int mdd_lfsck_main(void *args)
 	}
 
 	CDEBUG(D_LFSCK, "LFSCK: flags = 0x%x, pid = %d\n",
-	       lfsck->ml_args, cfs_curproc_pid());
+	       lfsck->ml_args_oit, cfs_curproc_pid());
 
 	spin_lock(&lfsck->ml_lock);
 	thread_set_flags(thread, SVC_RUNNING);
@@ -197,49 +364,165 @@ noenv:
 	return rc;
 }
 
+/* external interfaces */
+
+int mdd_lfsck_set_speed(const struct lu_env *env, struct md_lfsck *lfsck,
+			__u32 limit)
+{
+	int rc;
+
+	mutex_lock(&lfsck->ml_mutex);
+	__mdd_lfsck_set_speed(lfsck, limit);
+	rc = mdd_lfsck_bookmark_store(env, lfsck);
+	mutex_unlock(&lfsck->ml_mutex);
+	return rc;
+}
+
 int mdd_lfsck_start(const struct lu_env *env, struct md_lfsck *lfsck,
 		    struct lfsck_start *start)
 {
-	struct ptlrpc_thread *thread  = &lfsck->ml_thread;
-	struct l_wait_info    lwi     = { 0 };
-	int		      rc      = 0;
-	__u16		      valid   = 0;
-	__u16		      flags   = 0;
+	struct lfsck_bookmark  *bk     = &lfsck->ml_bookmark_ram;
+	struct ptlrpc_thread   *thread = &lfsck->ml_thread;
+	struct lfsck_component *com;
+	struct l_wait_info      lwi    = { 0 };
+	bool			dirty  = false;
+	int			rc     = 0;
+	__u16			valid  = 0;
+	__u16			flags  = 0;
 	ENTRY;
 
-	if (lfsck->ml_it_obj == NULL)
+	if (lfsck->ml_obj_oit == NULL)
 		RETURN(-ENOTSUPP);
 
+	/* start == NULL means auto trigger paused LFSCK. */
+	if (start == NULL && cfs_list_empty(&lfsck->ml_list_scan))
+		RETURN(0);
+
 	mutex_lock(&lfsck->ml_mutex);
 	spin_lock(&lfsck->ml_lock);
-	if (thread_is_running(thread)) {
+	if (!thread_is_init(thread) && !thread_is_stopped(thread)) {
 		spin_unlock(&lfsck->ml_lock);
 		mutex_unlock(&lfsck->ml_mutex);
 		RETURN(-EALREADY);
 	}
 
 	spin_unlock(&lfsck->ml_lock);
-	if (start->ls_valid & LSV_SPEED_LIMIT)
-		mdd_lfsck_set_speed(lfsck, start->ls_speed_limit);
+
+	lfsck->ml_paused = 0;
+	lfsck->ml_oit_over = 0;
+	lfsck->ml_drop_dryrun = 0;
+	lfsck->ml_new_scanned = 0;
+
+	/* For auto trigger. */
+	if (start == NULL)
+		goto trigger;
+
+	start->ls_version = bk->lb_version;
+	if (start->ls_valid & LSV_SPEED_LIMIT) {
+		__mdd_lfsck_set_speed(lfsck, start->ls_speed_limit);
+		dirty = true;
+	}
 
 	if (start->ls_valid & LSV_ERROR_HANDLE) {
 		valid |= DOIV_ERROR_HANDLE;
 		if (start->ls_flags & LPF_FAILOUT)
 			flags |= DOIF_FAILOUT;
+
+		if ((start->ls_flags & LPF_FAILOUT) &&
+		    !(bk->lb_param & LPF_FAILOUT)) {
+			bk->lb_param |= LPF_FAILOUT;
+			dirty = true;
+		} else if (!(start->ls_flags & LPF_FAILOUT) &&
+			   (bk->lb_param & LPF_FAILOUT)) {
+			bk->lb_param &= ~LPF_FAILOUT;
+			dirty = true;
+		}
 	}
 
-	/* XXX: 1. low layer does not care 'dryrun'.
-	 *      2. will process 'ls_active' when introduces LFSCK for layout
-	 *	   consistency, DNE consistency, and so on in the future. */
-	start->ls_active = 0;
+	if (start->ls_valid & LSV_DRYRUN) {
+		if ((start->ls_flags & LPF_DRYRUN) &&
+		    !(bk->lb_param & LPF_DRYRUN)) {
+			bk->lb_param |= LPF_DRYRUN;
+			dirty = true;
+		} else if (!(start->ls_flags & LPF_DRYRUN) &&
+			   (bk->lb_param & LPF_DRYRUN)) {
+			bk->lb_param &= ~LPF_DRYRUN;
+			lfsck->ml_drop_dryrun = 1;
+			dirty = true;
+		}
+	}
+
+	if (dirty) {
+		rc = mdd_lfsck_bookmark_store(env, lfsck);
+		if (rc != 0)
+			GOTO(out, rc);
+	}
 
 	if (start->ls_flags & LPF_RESET)
 		flags |= DOIF_RESET;
 
-	if (start->ls_active != 0)
+	if (start->ls_active != 0) {
+		struct lfsck_component *next;
+		__u16 type = 1;
+
+		if (start->ls_active == LFSCK_TYPES_ALL)
+			start->ls_active = LFSCK_TYPES_SUPPORTED;
+
+		if (start->ls_active & ~LFSCK_TYPES_SUPPORTED) {
+			start->ls_active &= ~LFSCK_TYPES_SUPPORTED;
+			GOTO(out, rc = -ENOTSUPP);
+		}
+
+		cfs_list_for_each_entry_safe(com, next,
+					     &lfsck->ml_list_scan, lc_link) {
+			if (!(com->lc_type & start->ls_active)) {
+				rc = com->lc_ops->lfsck_post(env, com, 0);
+				if (rc != 0)
+					GOTO(out, rc);
+			}
+		}
+
+		while (start->ls_active != 0) {
+			if (type & start->ls_active) {
+				com = __mdd_lfsck_component_find(lfsck, type,
+							&lfsck->ml_list_idle);
+				if (com != NULL) {
+					/* The component status will be updated
+					 * when its prep() is called later by
+					 * the LFSCK main engine. */
+					cfs_list_del_init(&com->lc_link);
+					cfs_list_add_tail(&com->lc_link,
+							  &lfsck->ml_list_scan);
+				}
+				start->ls_active &= ~type;
+			}
+			type <<= 1;
+		}
+	}
+
+	cfs_list_for_each_entry(com, &lfsck->ml_list_scan, lc_link) {
+		start->ls_active |= com->lc_type;
+		if (flags & DOIF_RESET) {
+			rc = com->lc_ops->lfsck_reset(env, com, false);
+			if (rc != 0)
+				GOTO(out, rc);
+		}
+	}
+
+trigger:
+	lfsck->ml_args_dir = LUDA_64BITHASH | LUDA_VERIFY;
+	if (bk->lb_param & LPF_DRYRUN)
+		lfsck->ml_args_dir |= LUDA_VERIFY_DRYRUN;
+
+	if (bk->lb_param & LPF_FAILOUT) {
+		valid |= DOIV_ERROR_HANDLE;
+		flags |= DOIF_FAILOUT;
+	}
+
+	if (!cfs_list_empty(&lfsck->ml_list_scan))
 		flags |= DOIF_OUTUSED;
 
-	lfsck->ml_args = (flags << DT_OTABLE_IT_FLAGS_SHIFT) | valid;
+	lfsck->ml_args_oit = (flags << DT_OTABLE_IT_FLAGS_SHIFT) | valid;
 	thread_set_flags(thread, 0);
 	rc = cfs_create_thread(mdd_lfsck_main, lfsck, 0);
 	if (rc < 0)
@@ -250,12 +533,16 @@ int mdd_lfsck_start(const struct lu_env *env, struct md_lfsck *lfsck,
 			     thread_is_running(thread) ||
 			     thread_is_stopped(thread),
 			     &lwi);
-	mutex_unlock(&lfsck->ml_mutex);
 
-	RETURN(rc < 0 ? rc : 0);
+	GOTO(out, rc = 0);
+
+out:
+	mutex_unlock(&lfsck->ml_mutex);
+	return (rc < 0 ? rc : 0);
 }
 
-int mdd_lfsck_stop(const struct lu_env *env, struct md_lfsck *lfsck)
+int mdd_lfsck_stop(const struct lu_env *env, struct md_lfsck *lfsck,
+		   bool pause)
 {
 	struct ptlrpc_thread *thread = &lfsck->ml_thread;
 	struct l_wait_info    lwi    = { 0 };
@@ -269,7 +556,14 @@ int mdd_lfsck_stop(const struct lu_env *env, struct md_lfsck *lfsck)
 		RETURN(-EALREADY);
 	}
 
+	if (pause)
+		lfsck->ml_paused = 1;
 	thread_set_flags(thread, SVC_STOPPING);
+	/* The LFSCK thread may be sleeping on low layer wait queue,
+	 * wake it up. */
+	if (likely(lfsck->ml_di_oit != NULL))
+		lfsck->ml_obj_oit->do_index_ops->dio_it.put(env,
+							    lfsck->ml_di_oit);
 	spin_unlock(&lfsck->ml_lock);
 
 	cfs_waitq_broadcast(&thread->t_ctl_waitq);
@@ -281,8 +575,6 @@ int mdd_lfsck_stop(const struct lu_env *env, struct md_lfsck *lfsck)
 	RETURN(0);
 }
 
-const char lfsck_bookmark_name[] = "lfsck_bookmark";
-
 static const struct lu_fid lfsck_it_fid = { .f_seq = FID_SEQ_LOCAL_FILE,
 					    .f_oid = OTABLE_IT_OID,
 					    .f_ver = 0 };
@@ -292,50 +584,90 @@ int mdd_lfsck_setup(const struct lu_env *env, struct mdd_device *mdd)
 	struct md_lfsck  *lfsck = &mdd->mdd_lfsck;
 	struct dt_object *obj;
 	int		  rc;
+	ENTRY;
 
-	memset(lfsck, 0, sizeof(*lfsck));
-	lfsck->ml_version = LFSCK_VERSION_V1;
-	cfs_waitq_init(&lfsck->ml_thread.t_ctl_waitq);
+	LASSERT(!lfsck->ml_initialized);
+
+	lfsck->ml_initialized = 1;
 	mutex_init(&lfsck->ml_mutex);
 	spin_lock_init(&lfsck->ml_lock);
+	CFS_INIT_LIST_HEAD(&lfsck->ml_list_scan);
+	CFS_INIT_LIST_HEAD(&lfsck->ml_list_dir);
+	CFS_INIT_LIST_HEAD(&lfsck->ml_list_double_scan);
+	CFS_INIT_LIST_HEAD(&lfsck->ml_list_idle);
+	cfs_waitq_init(&lfsck->ml_thread.t_ctl_waitq);
 
-	obj = dt_store_open(env, mdd->mdd_child, "", lfsck_bookmark_name,
-			    &mdd_env_info(env)->mti_fid);
-	if (IS_ERR(obj))
-		return PTR_ERR(obj);
-
-	lfsck->ml_bookmark_obj = obj;
-
-	obj = dt_locate(env, mdd->mdd_child, &lfsck_it_fid);
+	obj = dt_locate(env, mdd->mdd_bottom, &lfsck_it_fid);
 	if (IS_ERR(obj))
-		return PTR_ERR(obj);
+		RETURN(PTR_ERR(obj));
 
+	lfsck->ml_obj_oit = obj;
 	rc = obj->do_ops->do_index_try(env, obj, &dt_otable_features);
 	if (rc != 0) {
-		lu_object_put(env, &obj->do_lu);
 		if (rc == -ENOTSUPP)
 			rc = 0;
-		return rc;
+
+		RETURN(rc);
 	}
 
-	lfsck->ml_it_obj = obj;
+	obj = dt_store_open(env, mdd->mdd_bottom, "", lfsck_bookmark_name,
+			    &mdd_env_info(env)->mti_fid);
+	if (IS_ERR(obj))
+		RETURN(PTR_ERR(obj));
+
+	lfsck->ml_bookmark_obj = obj;
+	rc = mdd_lfsck_bookmark_load(env, lfsck);
+	if (rc == -ENODATA)
+		rc = mdd_lfsck_bookmark_init(env, lfsck);
+
+	/* XXX: LFSCK components initialization to be added here. */
 
-	return 0;
+	RETURN(rc);
 }
 
 void mdd_lfsck_cleanup(const struct lu_env *env, struct mdd_device *mdd)
 {
-	struct md_lfsck *lfsck = &mdd->mdd_lfsck;
+	struct md_lfsck		*lfsck  = &mdd->mdd_lfsck;
+	struct ptlrpc_thread	*thread = &lfsck->ml_thread;
+	struct lfsck_component	*com;
 
-	if (lfsck->ml_it_obj != NULL) {
-		lfsck->ml_paused = 1;
-		mdd_lfsck_stop(env, lfsck);
-		lu_object_put(env, &lfsck->ml_it_obj->do_lu);
-		lfsck->ml_it_obj = NULL;
+	if (!lfsck->ml_initialized)
+		return;
+
+	LASSERT(thread_is_init(thread) || thread_is_stopped(thread));
+
+	if (lfsck->ml_obj_oit != NULL) {
+		lu_object_put(env, &lfsck->ml_obj_oit->do_lu);
+		lfsck->ml_obj_oit = NULL;
 	}
 
+	LASSERT(lfsck->ml_obj_dir == NULL);
+
 	if (lfsck->ml_bookmark_obj != NULL) {
 		lu_object_put(env, &lfsck->ml_bookmark_obj->do_lu);
 		lfsck->ml_bookmark_obj = NULL;
 	}
+
+	while (!cfs_list_empty(&lfsck->ml_list_scan)) {
+		com = cfs_list_entry(lfsck->ml_list_scan.next,
+				     struct lfsck_component,
+				     lc_link);
+		mdd_lfsck_component_cleanup(env, com);
+	}
+
+	LASSERT(cfs_list_empty(&lfsck->ml_list_dir));
+
+	while (!cfs_list_empty(&lfsck->ml_list_double_scan)) {
+		com = cfs_list_entry(lfsck->ml_list_double_scan.next,
+				     struct lfsck_component,
+				     lc_link);
+		mdd_lfsck_component_cleanup(env, com);
+	}
+
+	while (!cfs_list_empty(&lfsck->ml_list_idle)) {
+		com = cfs_list_entry(lfsck->ml_list_idle.next,
+				     struct lfsck_component,
+				     lc_link);
+		mdd_lfsck_component_cleanup(env, com);
+	}
 }