diff options
Diffstat (limited to 'xlators/features/bit-rot/src/bitd')
| -rw-r--r-- | xlators/features/bit-rot/src/bitd/bit-rot.c | 364 | ||||
| -rw-r--r-- | xlators/features/bit-rot/src/bitd/bit-rot.h | 32 |
2 files changed, 270 insertions, 126 deletions
diff --git a/xlators/features/bit-rot/src/bitd/bit-rot.c b/xlators/features/bit-rot/src/bitd/bit-rot.c index 4b698fc9fa4..7a0a1b58b93 100644 --- a/xlators/features/bit-rot/src/bitd/bit-rot.c +++ b/xlators/features/bit-rot/src/bitd/bit-rot.c @@ -25,6 +25,18 @@ #define BR_HASH_CALC_READ_SIZE (128 * 1024) +typedef int32_t (br_child_handler)(xlator_t *, br_child_t *); + +struct br_child_event { + xlator_t *this; + + br_child_t *child; + + br_child_handler *call; + + struct list_head list; +}; + static int br_find_child_index (xlator_t *this, xlator_t *child) { @@ -49,26 +61,6 @@ out: return index; } -static void -br_free_children (xlator_t *this) -{ - br_private_t *priv = NULL; - int32_t i = 0; - br_child_t *child = NULL; - - priv = this->private; - - for (i = 0; i < priv->child_count; i++) { - child = &priv->children[i]; - mem_pool_destroy (child->timer_pool); - list_del_init (&priv->children[i].list); - } - - GF_FREE (priv->children); - - priv->children = NULL; -} - br_child_t * br_get_child_from_brick_path (xlator_t *this, char *brick_path) { @@ -1085,6 +1077,16 @@ br_oneshot_signer (void *arg) return NULL; } +static void +br_set_child_state (br_child_t *child, br_child_state_t state) +{ + LOCK (&child->lock); + { + _br_set_child_state (child, state); + } + UNLOCK (&child->lock); +} + /** * At this point a thread is spawned to crawl the filesystem (in * tortoise pace) to sign objects that were not signed in previous run(s). @@ -1172,7 +1174,12 @@ br_enact_scrubber (xlator_t *this, br_child_t *child) goto error_return; } - ret = br_fsscan_schedule (this, child, fsscan, fsscrub); + /* this needs to be serialized with reconfigure() */ + pthread_mutex_lock (&priv->lock); + { + ret = br_fsscan_schedule (this, child, fsscan, fsscrub); + } + pthread_mutex_unlock (&priv->lock); if (ret) goto error_return; @@ -1197,6 +1204,30 @@ br_enact_scrubber (xlator_t *this, br_child_t *child) return -1; } +static int32_t +br_child_enaction (xlator_t *this, br_child_t *child, br_stub_init_t *stub) +{ + int32_t ret = -1; + br_private_t *priv = this->private; + + LOCK (&child->lock); + { + if (priv->iamscrubber) + ret = br_enact_scrubber (this, child); + else + ret = br_enact_signer (this, child, stub); + + if (!ret) { + _br_set_child_state (child, BR_CHILD_STATE_CONNECTED); + gf_log (this->name, GF_LOG_INFO, + "Connected to brick %s..", child->brick_path); + } + } + UNLOCK (&child->lock); + + return ret; +} + /** * This routine fetches various attributes associated with a child which * is basically a subvolume. Attributes include brick path and the stub @@ -1204,7 +1235,7 @@ br_enact_scrubber (xlator_t *this, br_child_t *child) * by getxattr() on a virtual key. Depending on the configuration, the * process either acts as a signer or a scrubber. */ -static inline int32_t +int32_t br_brick_connect (xlator_t *this, br_child_t *child) { int32_t ret = -1; @@ -1213,14 +1244,13 @@ br_brick_connect (xlator_t *this, br_child_t *child) struct iatt parent = {0, }; br_stub_init_t *stub = NULL; dict_t *xattr = NULL; - br_private_t *priv = NULL; int op_errno = 0; GF_VALIDATE_OR_GOTO ("bit-rot", this, out); GF_VALIDATE_OR_GOTO (this->name, child, out); GF_VALIDATE_OR_GOTO (this->name, this->private, out); - priv = this->private; + br_set_child_state (child, BR_CHILD_STATE_INITIALIZING); loc.inode = inode_ref (child->table->root); gf_uuid_copy (loc.gfid, loc.inode->gfid); @@ -1257,20 +1287,15 @@ br_brick_connect (xlator_t *this, br_child_t *child) child->tv.tv_sec = ntohl (stub->timebuf[0]); child->tv.tv_usec = ntohl (stub->timebuf[1]); - if (priv->iamscrubber) - ret = br_enact_scrubber (this, child); - else - ret = br_enact_signer (this, child, stub); - - if (!ret) - gf_msg (this->name, GF_LOG_INFO, 0, BRB_MSG_CONNECTED_TO_BRICK, - "Connected to brick %s..", child->brick_path); + ret = br_child_enaction (this, child, stub); free_dict: dict_unref (xattr); wipeloc: loc_wipe (&loc); out: + if (ret) + br_set_child_state (child, BR_CHILD_STATE_CONNFAILED); return ret; } @@ -1285,7 +1310,8 @@ br_handle_events (void *arg) int32_t ret = 0; xlator_t *this = NULL; br_private_t *priv = NULL; - br_child_t *child = NULL; + br_child_t *child = NULL; + struct br_child_event *childev = NULL; this = arg; priv = this->private; @@ -1304,17 +1330,20 @@ br_handle_events (void *arg) while (list_empty (&priv->bricks)) pthread_cond_wait (&priv->cond, &priv->lock); - child = list_first_entry - (&priv->bricks, br_child_t, list); - list_del_init (&child->list); + childev = list_first_entry + (&priv->bricks, struct br_child_event, list); + list_del_init (&childev->list); } pthread_mutex_unlock (&priv->lock); - ret = br_brick_connect (this, child); + child = childev->child; + ret = childev->call (this, child); if (ret) gf_msg (this->name, GF_LOG_ERROR, 0, - BRB_MSG_SUBVOL_CONNECT_FAILED, "failed to " - "connect to subvolume %s", child->xl->name); + BRB_MSG_SUBVOL_CONNECT_FAILED, + "callback handler for subvolume [%s] failed", + child->xl->name); + GF_FREE (childev); } return NULL; @@ -1339,6 +1368,29 @@ mem_acct_init (xlator_t *this) return ret; } +static void +_br_qchild_event (xlator_t *this, br_child_t *child, br_child_handler *call) +{ + br_private_t *priv = NULL; + struct br_child_event *childev = NULL; + + priv = this->private; + + childev = GF_CALLOC (1, sizeof (*childev), gf_br_mt_br_child_event_t); + if (!childev) { + gf_log (this->name, GF_LOG_ERROR, "Event unhandled for " + "child.. [Brick: %s]", child->xl->name); + return; + } + + INIT_LIST_HEAD (&childev->list); + childev->this = this; + childev->child = child; + childev->call = call; + + list_add_tail (&childev->list, &priv->bricks); +} + int notify (xlator_t *this, int32_t event, void *data, ...) { @@ -1368,14 +1420,14 @@ notify (xlator_t *this, int32_t event, void *data, ...) child = &priv->children[idx]; if (child->child_up == 1) goto unblock; + priv->up_children++; child->child_up = 1; child->xl = subvol; - child->table = inode_table_new (4096, subvol); + if (!child->table) + child->table = inode_table_new (4096, subvol); - priv->up_children++; - - list_add_tail (&child->list, &priv->bricks); + _br_qchild_event (this, child, br_brick_connect); pthread_cond_signal (&priv->cond); } unblock: @@ -1405,6 +1457,7 @@ notify (xlator_t *this, int32_t event, void *data, ...) if (priv->up_children == 0) default_notify (this, event, data); break; + default: default_notify (this, event, data); } @@ -1558,59 +1611,94 @@ br_signer_init (xlator_t *this, br_private_t *priv) } -int32_t -init (xlator_t *this) +static void +br_free_children (xlator_t *this, br_private_t *priv, int count) { - int i = 0; - int32_t ret = -1; - br_private_t *priv = NULL; - xlator_list_t *trav = NULL; + br_child_t *child = NULL; - if (!this->children) { - gf_msg (this->name, GF_LOG_ERROR, 0, BRB_MSG_NO_CHILD, - "FATAL: no children"); - goto out; + for (--count; count >= 0; count--) { + child = &priv->children[count]; + mem_pool_destroy (child->timer_pool); + LOCK_DESTROY (&child->lock); } - priv = GF_CALLOC (1, sizeof (*priv), gf_br_mt_br_private_t); - if (!priv) { - gf_msg (this->name, GF_LOG_ERROR, ENOMEM, BRB_MSG_NO_MEMORY, - "failed to allocate memory (->priv)"); - goto out; - } + GF_FREE (priv->children); + priv->children = NULL; +} - GF_OPTION_INIT ("scrubber", priv->iamscrubber, bool, out); +static int +br_init_children (xlator_t *this, br_private_t *priv) +{ + int i = 0; + br_child_t *child = NULL; + xlator_list_t *trav = NULL; priv->child_count = xlator_subvolume_count (this); priv->children = GF_CALLOC (priv->child_count, sizeof (*priv->children), gf_br_mt_br_child_t); if (!priv->children) - goto free_priv; + goto err; trav = this->children; while (trav) { - priv->children[i].this = this; - priv->children[i].xl = trav->xlator; - - priv->children[i].timer_pool = - mem_pool_new (struct gf_tw_timer_list, 4096); - if (!priv->children[i].timer_pool) { - gf_msg (this->name, GF_LOG_ERROR, ENOMEM, - BRB_MSG_NO_MEMORY, "failed to allocate mem-pool" - " for timer"); + child = &priv->children[i]; + + LOCK_INIT (&child->lock); + br_set_child_state (child, BR_CHILD_STATE_DISCONNECTED); + + child->this = this; + child->xl = trav->xlator; + + child->timer_pool = mem_pool_new + (struct gf_tw_timer_list, 4096); + if (!child->timer_pool) { + gf_log (this->name, GF_LOG_ERROR, + "failed to allocate mem-pool for timer"); errno = ENOMEM; - goto free_children; + goto freechild; } + INIT_LIST_HEAD (&child->list); + i++; trav = trav->next; } + return 0; + + freechild: + br_free_children (this, priv, i); + err: + return -1; +} + +int32_t +init (xlator_t *this) +{ + int32_t ret = -1; + br_private_t *priv = NULL; + + if (!this->children) { + gf_log (this->name, GF_LOG_ERROR, "FATAL: no children"); + goto out; + } + + priv = GF_CALLOC (1, sizeof (*priv), gf_br_mt_br_private_t); + if (!priv) { + gf_log (this->name, GF_LOG_ERROR, + "failed to allocate memory (->priv)"); + goto out; + } + + GF_OPTION_INIT ("scrubber", priv->iamscrubber, bool, out); + + ret = br_init_children (this, priv); + if (ret) + goto free_priv; + pthread_mutex_init (&priv->lock, NULL); pthread_cond_init (&priv->cond, NULL); - for (i = 0; i < priv->child_count; i++) - INIT_LIST_HEAD (&priv->children[i].list); INIT_LIST_HEAD (&priv->bricks); INIT_LIST_HEAD (&priv->signing); @@ -1619,7 +1707,7 @@ init (xlator_t *this) gf_msg (this->name, GF_LOG_ERROR, 0, BRB_MSG_TIMER_WHEEL_UNAVAILABLE, "global timer wheel unavailable"); - goto cleanup_mutex; + goto cleanup; } this->private = priv; @@ -1635,7 +1723,7 @@ init (xlator_t *this) } if (ret) - goto cleanup_mutex; + goto cleanup; ret = gf_thread_create (&priv->thread, NULL, br_handle_events, this); if (ret != 0) { @@ -1651,16 +1739,12 @@ init (xlator_t *this) return 0; } - cleanup_mutex: + cleanup: (void) pthread_cond_destroy (&priv->cond); (void) pthread_mutex_destroy (&priv->lock); - free_children: - for (i = 0; i < priv->child_count; i++) { - if (priv->children[i].timer_pool) - mem_pool_destroy (priv->children[i].timer_pool); - } - GF_FREE (priv->children); + br_free_children (this, priv, priv->child_count); + free_priv: GF_FREE (priv); out: @@ -1678,7 +1762,7 @@ fini (xlator_t *this) if (!priv->iamscrubber) br_fini_signer (this, priv); - br_free_children (this); + br_free_children (this, priv, priv->child_count); this->private = NULL; GF_FREE (priv); @@ -1686,64 +1770,96 @@ fini (xlator_t *this) return; } -int -reconfigure (xlator_t *this, dict_t *options) +static void +br_reconfigure_child (xlator_t *this, + br_child_t *child, struct br_scrubber *fsscrub) { - int i = 0; - int32_t ret = -1; - br_child_t *child = NULL; - br_private_t *priv = NULL; - struct br_scanfs *fsscan = NULL; + int32_t ret = 0; + struct br_scanfs *fsscan = &child->fsscan; + + ret = br_fsscan_reschedule (this, child, fsscan, fsscrub, _gf_true); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Could not reschedule scrubber for brick: %s. " + "Scubbing will continue according to old frequency.", + child->brick_path); + } +} + +static int +br_reconfigure_scrubber (xlator_t *this, dict_t *options) +{ + int i = 0; + int32_t ret = -1; + br_child_t *child = NULL; + br_private_t *priv = NULL; struct br_scrubber *fsscrub = NULL; priv = this->private; + fsscrub = &priv->fsscrub; - if (!priv->iamscrubber) { - ret = br_signer_handle_options (this, priv, options); - if (ret) - goto err; - return 0; + pthread_mutex_lock (&priv->lock); + { + ret = br_scrubber_handle_options (this, priv, options); } + pthread_mutex_unlock (&priv->lock); - ret = br_scrubber_handle_options (this, priv, options); if (ret) goto err; - fsscrub = &priv->fsscrub; - /* reschedule all _up_ subvolume(s) */ - pthread_mutex_lock (&priv->lock); - { - for (; i < priv->child_count; i++) { - child = &priv->children[i]; - if (!child->child_up) { - gf_msg (this->name, GF_LOG_INFO, 0, - BRB_MSG_BRICK_INFO, "Brick %s is " - "offline, skipping rescheduling (scrub" - " would auto- schedule when brick is " - "back online).", child->brick_path); - continue; - } + for (; i < priv->child_count; i++) { + child = &priv->children[i]; - fsscan = &child->fsscan; - ret = br_fsscan_reschedule (this, child, - fsscan, fsscrub, _gf_true); - if (ret) { - gf_msg (this->name, GF_LOG_ERROR, 0, - BRB_MSG_RESCHEDULE_SCRUBBER_FAILED, - "Could not reschedule scrubber for " - "brick: %s. Scubbing will continue " - "according to old frequency.", - child->brick_path); + LOCK (&child->lock); + { + if (_br_child_failed_conn (child)) { + gf_log (this->name, GF_LOG_INFO, + "Scrubber for brick [%s] failed " + "initialization, rescheduling is " + "skipped", child->brick_path); + goto unblock; } + + if (_br_is_child_connected (child)) + br_reconfigure_child (this, child, fsscrub); + + /** + * for the rest.. either the child is in initialization + * phase or is disconnected. either way, updated values + * would be reflected on successful connection. + */ } + unblock: + UNLOCK (&child->lock); } - pthread_mutex_unlock (&priv->lock); - - return 0; err: - return -1; + return ret; +} + +static int +br_reconfigure_signer (xlator_t *this, dict_t *options) +{ + br_private_t *priv = this->private; + + return br_signer_handle_options (this, priv, options); +} + +int +reconfigure (xlator_t *this, dict_t *options) +{ + int ret = 0; + br_private_t *priv = NULL; + + priv = this->private; + + if (priv->iamscrubber) + ret = br_reconfigure_scrubber (this, options); + else + ret = br_reconfigure_signer (this, options); + + return ret; } struct xlator_fops fops; diff --git a/xlators/features/bit-rot/src/bitd/bit-rot.h b/xlators/features/bit-rot/src/bitd/bit-rot.h index 7be4398d00d..d4742f4fea4 100644 --- a/xlators/features/bit-rot/src/bitd/bit-rot.h +++ b/xlators/features/bit-rot/src/bitd/bit-rot.h @@ -71,7 +71,18 @@ struct br_scanfs { struct gf_tw_timer_list *timer; }; +/* just need three states to track child status */ +typedef enum br_child_state { + BR_CHILD_STATE_CONNECTED = 1, + BR_CHILD_STATE_INITIALIZING, + BR_CHILD_STATE_CONNFAILED, + BR_CHILD_STATE_DISCONNECTED, +} br_child_state_t; + struct br_child { + gf_lock_t lock; + br_child_state_t c_state; + char child_up; /* Indicates whether this child is up or not */ xlator_t *xl; /* client xlator corresponding to @@ -135,8 +146,8 @@ typedef struct br_obj_n_workers br_obj_n_workers_t; struct br_private { pthread_mutex_t lock; - struct list_head bricks; /* list of bricks from which CHILD_UP - has been received */ + struct list_head bricks; /* list of bricks from which enents + have been received */ struct list_head signing; @@ -202,5 +213,22 @@ br_prepare_loc (xlator_t *, br_child_t *, loc_t *, gf_dirent_t *, loc_t *); gf_boolean_t bitd_is_bad_file (xlator_t *, br_child_t *, loc_t *, fd_t *); +static inline void +_br_set_child_state (br_child_t *child, br_child_state_t state) +{ + child->c_state = state; +} + +static inline int +_br_is_child_connected (br_child_t *child) +{ + return (child->c_state == BR_CHILD_STATE_CONNECTED); +} + +static inline int +_br_child_failed_conn (br_child_t *child) +{ + return (child->c_state == BR_CHILD_STATE_CONNFAILED); +} #endif /* __BIT_ROT_H__ */ |