diff options
| -rw-r--r-- | fs/ocfs2/dlmglue.c | 97 | ||||
| -rw-r--r-- | fs/ocfs2/dlmglue.h | 1 | ||||
| -rw-r--r-- | fs/ocfs2/heartbeat.c | 40 | ||||
| -rw-r--r-- | fs/ocfs2/heartbeat.h | 2 | ||||
| -rw-r--r-- | fs/ocfs2/ocfs2.h | 4 | ||||
| -rw-r--r-- | fs/ocfs2/stackglue.c | 131 | ||||
| -rw-r--r-- | fs/ocfs2/stackglue.h | 35 | ||||
| -rw-r--r-- | fs/ocfs2/super.c | 13 |
8 files changed, 221 insertions, 102 deletions
diff --git a/fs/ocfs2/dlmglue.c b/fs/ocfs2/dlmglue.c index 4590376..6652a48 100644 --- a/fs/ocfs2/dlmglue.c +++ b/fs/ocfs2/dlmglue.c @@ -27,7 +27,6 @@ #include <linux/slab.h> #include <linux/highmem.h> #include <linux/mm.h> -#include <linux/crc32.h> #include <linux/kthread.h> #include <linux/pagemap.h> #include <linux/debugfs.h> @@ -259,31 +258,6 @@ static struct ocfs2_lock_res_ops ocfs2_flock_lops = { .flags = 0, }; -/* - * This is the filesystem locking protocol version. - * - * Whenever the filesystem does new things with locks (adds or removes a - * lock, orders them differently, does different things underneath a lock), - * the version must be changed. The protocol is negotiated when joining - * the dlm domain. A node may join the domain if its major version is - * identical to all other nodes and its minor version is greater than - * or equal to all other nodes. When its minor version is greater than - * the other nodes, it will run at the minor version specified by the - * other nodes. - * - * If a locking change is made that will not be compatible with older - * versions, the major number must be increased and the minor version set - * to zero. If a change merely adds a behavior that can be disabled when - * speaking to older versions, the minor version must be increased. If a - * change adds a fully backwards compatible change (eg, LVB changes that - * are just ignored by older versions), the version does not need to be - * updated. - */ -const struct dlm_protocol_version ocfs2_locking_protocol = { - .pv_major = OCFS2_LOCKING_PROTOCOL_MAJOR, - .pv_minor = OCFS2_LOCKING_PROTOCOL_MINOR, -}; - static inline int ocfs2_is_inode_lock(struct ocfs2_lock_res *lockres) { return lockres->l_type == OCFS2_LOCK_TYPE_META || @@ -886,7 +860,7 @@ static int ocfs2_lock_create(struct ocfs2_super *osb, lockres_or_flags(lockres, OCFS2_LOCK_BUSY); spin_unlock_irqrestore(&lockres->l_lock, flags); - ret = ocfs2_dlm_lock(osb->dlm, + ret = ocfs2_dlm_lock(osb->cconn, level, &lockres->l_lksb, dlm_flags, @@ -1085,7 +1059,7 @@ again: lockres->l_name, lockres->l_level, level); /* call dlm_lock to upgrade lock now */ - ret = ocfs2_dlm_lock(osb->dlm, + ret = ocfs2_dlm_lock(osb->cconn, level, &lockres->l_lksb, lkm_flags, @@ -1492,7 +1466,7 @@ int ocfs2_file_lock(struct file *file, int ex, int trylock) lockres_add_mask_waiter(lockres, &mw, OCFS2_LOCK_BUSY, 0); spin_unlock_irqrestore(&lockres->l_lock, flags); - ret = ocfs2_dlm_lock(osb->dlm, level, &lockres->l_lksb, lkm_flags, + ret = ocfs2_dlm_lock(osb->cconn, level, &lockres->l_lksb, lkm_flags, lockres->l_name, OCFS2_LOCK_ID_MAX_LEN - 1, lockres); if (ret) { @@ -2485,8 +2459,7 @@ static void ocfs2_dlm_shutdown_debug(struct ocfs2_super *osb) int ocfs2_dlm_init(struct ocfs2_super *osb) { int status = 0; - u32 dlm_key; - struct dlm_ctxt *dlm = NULL; + struct ocfs2_cluster_connection *conn = NULL; mlog_entry_void(); @@ -2508,26 +2481,21 @@ int ocfs2_dlm_init(struct ocfs2_super *osb) goto bail; } - /* used by the dlm code to make message headers unique, each - * node in this domain must agree on this. */ - dlm_key = crc32_le(0, osb->uuid_str, strlen(osb->uuid_str)); - /* for now, uuid == domain */ - dlm = dlm_register_domain(osb->uuid_str, dlm_key, - &osb->osb_locking_proto); - if (IS_ERR(dlm)) { - status = PTR_ERR(dlm); + status = ocfs2_cluster_connect(osb->uuid_str, + strlen(osb->uuid_str), + ocfs2_do_node_down, osb, + &conn); + if (status) { mlog_errno(status); goto bail; } - dlm_register_eviction_cb(dlm, &osb->osb_eviction_cb); - local: ocfs2_super_lock_res_init(&osb->osb_super_lockres, osb); ocfs2_rename_lock_res_init(&osb->osb_rename_lockres, osb); - osb->dlm = dlm; + osb->cconn = conn; status = 0; bail: @@ -2545,10 +2513,14 @@ void ocfs2_dlm_shutdown(struct ocfs2_super *osb) { mlog_entry_void(); - dlm_unregister_eviction_cb(&osb->osb_eviction_cb); - ocfs2_drop_osb_locks(osb); + /* + * Now that we have dropped all locks and ocfs2_dismount_volume() + * has disabled recovery, the DLM won't be talking to us. It's + * safe to tear things down before disconnecting the cluster. + */ + if (osb->dc_task) { kthread_stop(osb->dc_task); osb->dc_task = NULL; @@ -2557,8 +2529,8 @@ void ocfs2_dlm_shutdown(struct ocfs2_super *osb) ocfs2_lock_res_free(&osb->osb_super_lockres); ocfs2_lock_res_free(&osb->osb_rename_lockres); - dlm_unregister_domain(osb->dlm); - osb->dlm = NULL; + ocfs2_cluster_disconnect(osb->cconn); + osb->cconn = NULL; ocfs2_dlm_shutdown_debug(osb); @@ -2689,7 +2661,7 @@ static int ocfs2_drop_lock(struct ocfs2_super *osb, mlog(0, "lock %s\n", lockres->l_name); - ret = ocfs2_dlm_unlock(osb->dlm, &lockres->l_lksb, lkm_flags, + ret = ocfs2_dlm_unlock(osb->cconn, &lockres->l_lksb, lkm_flags, lockres); if (ret) { ocfs2_log_dlm_error("ocfs2_dlm_unlock", ret, lockres); @@ -2823,7 +2795,7 @@ static int ocfs2_downconvert_lock(struct ocfs2_super *osb, if (lvb) dlm_flags |= DLM_LKF_VALBLK; - ret = ocfs2_dlm_lock(osb->dlm, + ret = ocfs2_dlm_lock(osb->cconn, new_level, &lockres->l_lksb, dlm_flags, @@ -2882,7 +2854,7 @@ static int ocfs2_cancel_convert(struct ocfs2_super *osb, mlog_entry_void(); mlog(0, "lock %s\n", lockres->l_name); - ret = ocfs2_dlm_unlock(osb->dlm, &lockres->l_lksb, + ret = ocfs2_dlm_unlock(osb->cconn, &lockres->l_lksb, DLM_LKF_CANCEL, lockres); if (ret) { ocfs2_log_dlm_error("ocfs2_dlm_unlock", ret, lockres); @@ -3193,7 +3165,34 @@ static int ocfs2_dentry_convert_worker(struct ocfs2_lock_res *lockres, return UNBLOCK_CONTINUE_POST; } +/* + * This is the filesystem locking protocol. It provides the lock handling + * hooks for the underlying DLM. It has a maximum version number. + * The version number allows interoperability with systems running at + * the same major number and an equal or smaller minor number. + * + * Whenever the filesystem does new things with locks (adds or removes a + * lock, orders them differently, does different things underneath a lock), + * the version must be changed. The protocol is negotiated when joining + * the dlm domain. A node may join the domain if its major version is + * identical to all other nodes and its minor version is greater than + * or equal to all other nodes. When its minor version is greater than + * the other nodes, it will run at the minor version specified by the + * other nodes. + * + * If a locking change is made that will not be compatible with older + * versions, the major number must be increased and the minor version set + * to zero. If a change merely adds a behavior that can be disabled when + * speaking to older versions, the minor version must be increased. If a + * change adds a fully backwards compatible change (eg, LVB changes that + * are just ignored by older versions), the version does not need to be + * updated. + */ static struct ocfs2_locking_protocol lproto = { + .lp_max_version = { + .pv_major = OCFS2_LOCKING_PROTOCOL_MAJOR, + .pv_minor = OCFS2_LOCKING_PROTOCOL_MINOR, + }, .lp_lock_ast = ocfs2_locking_ast, .lp_blocking_ast = ocfs2_blocking_ast, .lp_unlock_ast = ocfs2_unlock_ast, diff --git a/fs/ocfs2/dlmglue.h b/fs/ocfs2/dlmglue.h index 3238043..2d0a8a0 100644 --- a/fs/ocfs2/dlmglue.h +++ b/fs/ocfs2/dlmglue.h @@ -117,5 +117,4 @@ void ocfs2_put_dlm_debug(struct ocfs2_dlm_debug *dlm_debug); void dlmglue_init_stack(void); void dlmglue_exit_stack(void); -extern const struct dlm_protocol_version ocfs2_locking_protocol; #endif /* DLMGLUE_H */ diff --git a/fs/ocfs2/heartbeat.c b/fs/ocfs2/heartbeat.c index 80de239..dcac1a4 100644 --- a/fs/ocfs2/heartbeat.c +++ b/fs/ocfs2/heartbeat.c @@ -30,8 +30,6 @@ #include <linux/highmem.h> #include <linux/kmod.h> -#include <dlm/dlmapi.h> - #define MLOG_MASK_PREFIX ML_SUPER #include <cluster/masklog.h> @@ -64,19 +62,20 @@ void ocfs2_init_node_maps(struct ocfs2_super *osb) ocfs2_node_map_init(&osb->osb_recovering_orphan_dirs); } -static void ocfs2_do_node_down(int node_num, - struct ocfs2_super *osb) +void ocfs2_do_node_down(int node_num, void *data) { + struct ocfs2_super *osb = data; + BUG_ON(osb->node_num == node_num); mlog(0, "ocfs2: node down event for %d\n", node_num); - if (!osb->dlm) { + if (!osb->cconn) { /* - * No DLM means we're not even ready to participate yet. - * We check the slots after the DLM comes up, so we will - * notice the node death then. We can safely ignore it - * here. + * No cluster connection means we're not even ready to + * participate yet. We check the slots after the cluster + * comes up, so we will notice the node death then. We + * can safely ignore it here. */ return; } @@ -84,29 +83,6 @@ static void ocfs2_do_node_down(int node_num, ocfs2_recovery_thread(osb, node_num); } -/* Called from the dlm when it's about to evict a node. We may also - * get a heartbeat callback later. */ -static void ocfs2_dlm_eviction_cb(int node_num, - void *data) -{ - struct ocfs2_super *osb = (struct ocfs2_super *) data; - struct super_block *sb = osb->sb; - - mlog(ML_NOTICE, "device (%u,%u): dlm has evicted node %d\n", - MAJOR(sb->s_dev), MINOR(sb->s_dev), node_num); - - ocfs2_do_node_down(node_num, osb); -} - -void ocfs2_setup_hb_callbacks(struct ocfs2_super *osb) -{ - /* Not exactly a heartbeat callback, but leads to essentially - * the same path so we set it up here. */ - dlm_setup_eviction_cb(&osb->osb_eviction_cb, - ocfs2_dlm_eviction_cb, - osb); -} - void ocfs2_stop_heartbeat(struct ocfs2_super *osb) { int ret; diff --git a/fs/ocfs2/heartbeat.h b/fs/ocfs2/heartbeat.h index 98d8ffc..38e2450 100644 --- a/fs/ocfs2/heartbeat.h +++ b/fs/ocfs2/heartbeat.h @@ -28,7 +28,7 @@ void ocfs2_init_node_maps(struct ocfs2_super *osb); -void ocfs2_setup_hb_callbacks(struct ocfs2_super *osb); +void ocfs2_do_node_down(int node_num, void *data); void ocfs2_stop_heartbeat(struct ocfs2_super *osb); /* node map functions - used to keep track of mounted and in-recovery diff --git a/fs/ocfs2/ocfs2.h b/fs/ocfs2/ocfs2.h index 6d7c6d2..664e4fe 100644 --- a/fs/ocfs2/ocfs2.h +++ b/fs/ocfs2/ocfs2.h @@ -248,12 +248,10 @@ struct ocfs2_super struct ocfs2_alloc_stats alloc_stats; char dev_str[20]; /* "major,minor" of the device */ - struct dlm_ctxt *dlm; + struct ocfs2_cluster_connection *cconn; struct ocfs2_lock_res osb_super_lockres; struct ocfs2_lock_res osb_rename_lockres; - struct dlm_eviction_cb osb_eviction_cb; struct ocfs2_dlm_debug *osb_dlm_debug; - struct dlm_protocol_version osb_locking_proto; struct dentry *osb_debug_root; diff --git a/fs/ocfs2/stackglue.c b/fs/ocfs2/stackglue.c index eb88854..f6f309a 100644 --- a/fs/ocfs2/stackglue.c +++ b/fs/ocfs2/stackglue.c @@ -18,11 +18,21 @@ * General Public License for more details. */ +#include <linux/slab.h> +#include <linux/crc32.h> + +/* Needed for AOP_TRUNCATED_PAGE in mlog_errno() */ +#include <linux/fs.h> + #include "cluster/masklog.h" #include "stackglue.h" static struct ocfs2_locking_protocol *lproto; +struct o2dlm_private { + struct dlm_eviction_cb op_eviction_cb; +}; + /* These should be identical */ #if (DLM_LOCK_IV != LKM_IVMODE) # error Lock modes do not match @@ -197,7 +207,7 @@ static void o2dlm_unlock_ast_wrapper(void *astarg, enum dlm_status status) lproto->lp_unlock_ast(astarg, error); } -int ocfs2_dlm_lock(struct dlm_ctxt *dlm, +int ocfs2_dlm_lock(struct ocfs2_cluster_connection *conn, int mode, union ocfs2_dlm_lksb *lksb, u32 flags, @@ -212,15 +222,15 @@ int ocfs2_dlm_lock(struct dlm_ctxt *dlm, BUG_ON(lproto == NULL); - status = dlmlock(dlm, o2dlm_mode, &lksb->lksb_o2dlm, o2dlm_flags, - name, namelen, + status = dlmlock(conn->cc_lockspace, o2dlm_mode, &lksb->lksb_o2dlm, + o2dlm_flags, name, namelen, o2dlm_lock_ast_wrapper, astarg, o2dlm_blocking_ast_wrapper); ret = dlm_status_to_errno(status); return ret; } -int ocfs2_dlm_unlock(struct dlm_ctxt *dlm, +int ocfs2_dlm_unlock(struct ocfs2_cluster_connection *conn, union ocfs2_dlm_lksb *lksb, u32 flags, void *astarg) @@ -231,8 +241,8 @@ int ocfs2_dlm_unlock(struct dlm_ctxt *dlm, BUG_ON(lproto == NULL); - status = dlmunlock(dlm, &lksb->lksb_o2dlm, o2dlm_flags, - o2dlm_unlock_ast_wrapper, astarg); + status = dlmunlock(conn->cc_lockspace, &lksb->lksb_o2dlm, + o2dlm_flags, o2dlm_unlock_ast_wrapper, astarg); ret = dlm_status_to_errno(status); return ret; } @@ -252,6 +262,115 @@ void *ocfs2_dlm_lvb(union ocfs2_dlm_lksb *lksb) return (void *)(lksb->lksb_o2dlm.lvb); } +/* + * Called from the dlm when it's about to evict a node. This is how the + * classic stack signals node death. + */ +static void o2dlm_eviction_cb(int node_num, void *data) +{ + struct ocfs2_cluster_connection *conn = data; + + mlog(ML_NOTICE, "o2dlm has evicted node %d from group %.*s\n", + node_num, conn->cc_namelen, conn->cc_name); + + conn->cc_recovery_handler(node_num, conn->cc_recovery_data); +} + +int ocfs2_cluster_connect(const char *group, + int grouplen, + void (*recovery_handler)(int node_num, + void *recovery_data), + void *recovery_data, + struct ocfs2_cluster_connection **conn) +{ + int rc = 0; + struct ocfs2_cluster_connection *new_conn; + u32 dlm_key; + struct dlm_ctxt *dlm; + struct o2dlm_private *priv; + struct dlm_protocol_version dlm_version; + + BUG_ON(group == NULL); + BUG_ON(conn == NULL); + BUG_ON(recovery_handler == NULL); + + if (grouplen > GROUP_NAME_MAX) { + rc = -EINVAL; + goto out; + } + + new_conn = kzalloc(sizeof(struct ocfs2_cluster_connection), + GFP_KERNEL); + if (!new_conn) { + rc = -ENOMEM; + goto out; + } + + memcpy(new_conn->cc_name, group, grouplen); + new_conn->cc_namelen = grouplen; + new_conn->cc_recovery_handler = recovery_handler; + new_conn->cc_recovery_data = recovery_data; + + /* Start the new connection at our maximum compatibility level */ + new_conn->cc_version = lproto->lp_max_version; + + priv = kzalloc(sizeof(struct o2dlm_private), GFP_KERNEL); + if (!priv) { + rc = -ENOMEM; + goto out_free; + } + + /* This just fills the structure in. It is safe to use new_conn. */ + dlm_setup_eviction_cb(&priv->op_eviction_cb, o2dlm_eviction_cb, + new_conn); + + new_conn->cc_private = priv; + + /* used by the dlm code to make message headers unique, each + * node in this domain must agree on this. */ + dlm_key = crc32_le(0, group, grouplen); + dlm_version.pv_major = new_conn->cc_version.pv_major; + dlm_version.pv_minor = new_conn->cc_version.pv_minor; + + dlm = dlm_register_domain(group, dlm_key, &dlm_version); + if (IS_ERR(dlm)) { + rc = PTR_ERR(dlm); + mlog_errno(rc); + goto out_free; + } + + new_conn->cc_version.pv_major = dlm_version.pv_major; + new_conn->cc_version.pv_minor = dlm_version.pv_minor; + new_conn->cc_lockspace = dlm; + + dlm_register_eviction_cb(dlm, &priv->op_eviction_cb); + + *conn = new_conn; + +out_free: + if (rc) { + kfree(new_conn->cc_private); + kfree(new_conn); + } + +out: + return rc; +} + +int ocfs2_cluster_disconnect(struct ocfs2_cluster_connection *conn) +{ + struct dlm_ctxt *dlm = conn->cc_lockspace; + struct o2dlm_private *priv = conn->cc_private; + + dlm_unregister_eviction_cb(&priv->op_eviction_cb); + dlm_unregister_domain(dlm); + + kfree(priv); + kfree(conn); + + return 0; +} + void o2cb_get_stack(struct ocfs2_locking_protocol *proto) { BUG_ON(proto == NULL); diff --git a/fs/ocfs2/stackglue.h b/fs/ocfs2/stackglue.h index 3c91e24..3900b5c 100644 --- a/fs/ocfs2/stackglue.h +++ b/fs/ocfs2/stackglue.h @@ -32,9 +32,22 @@ */ #define DLM_LKF_LOCAL 0x00100000 +/* + * This shadows DLM_LOCKSPACE_LEN in fs/dlm/dlm_internal.h. That probably + * wants to be in a public header. + */ +#define GROUP_NAME_MAX 64 + + #include "dlm/dlmapi.h" +struct ocfs2_protocol_version { + u8 pv_major; + u8 pv_minor; +}; + struct ocfs2_locking_protocol { + struct ocfs2_protocol_version lp_max_version; void (*lp_lock_ast)(void *astarg); void (*lp_blocking_ast)(void *astarg, int level); void (*lp_unlock_ast)(void *astarg, int error); @@ -44,14 +57,32 @@ union ocfs2_dlm_lksb { struct dlm_lockstatus lksb_o2dlm; }; -int ocfs2_dlm_lock(struct dlm_ctxt *dlm, +struct ocfs2_cluster_connection { + char cc_name[GROUP_NAME_MAX]; + int cc_namelen; + struct ocfs2_protocol_version cc_version; + void (*cc_recovery_handler)(int node_num, void *recovery_data); + void *cc_recovery_data; + void *cc_lockspace; + void *cc_private; +}; + +int ocfs2_cluster_connect(const char *group, + int grouplen, + void (*recovery_handler)(int node_num, + void *recovery_data), + void *recovery_data, + struct ocfs2_cluster_connection **conn); +int ocfs2_cluster_disconnect(struct ocfs2_cluster_connection *conn); + +int ocfs2_dlm_lock(struct ocfs2_cluster_connection *conn, int mode, union ocfs2_dlm_lksb *lksb, u32 flags, void *name, unsigned int namelen, void *astarg); -int ocfs2_dlm_unlock(struct dlm_ctxt *dlm, +int ocfs2_dlm_unlock(struct ocfs2_cluster_connection *conn, union ocfs2_dlm_lksb *lksb, u32 flags, void *astarg); diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c index c867546..0ee4975 100644 --- a/fs/ocfs2/super.c +++ b/fs/ocfs2/super.c @@ -1251,9 +1251,9 @@ static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err) ocfs2_sync_blockdev(sb); - /* No dlm means we've failed during mount, so skip all the - * steps which depended on that to complete. */ - if (osb->dlm) { + /* No cluster connection means we've failed during mount, so skip + * all the steps which depended on that to complete. */ + if (osb->cconn) { tmp = ocfs2_super_lock(osb, 1); if (tmp < 0) { mlog_errno(tmp); @@ -1264,12 +1264,12 @@ static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err) if (osb->slot_num != OCFS2_INVALID_SLOT) ocfs2_put_slot(osb); - if (osb->dlm) + if (osb->cconn) ocfs2_super_unlock(osb, 1); ocfs2_release_system_inodes(osb); - if (osb->dlm) + if (osb->cconn) ocfs2_dlm_shutdown(osb); debugfs_remove(osb->osb_debug_root); @@ -1341,7 +1341,6 @@ static int ocfs2_initialize_super(struct super_block *sb, sb->s_fs_info = osb; sb->s_op = &ocfs2_sops; sb->s_export_op = &ocfs2_export_ops; - osb->osb_locking_proto = ocfs2_locking_protocol; sb->s_time_gran = 1; sb->s_flags |= MS_NOATIME; /* this is needed to support O_LARGEFILE */ @@ -1391,8 +1390,6 @@ static int ocfs2_initialize_super(struct super_block *sb, osb->local_alloc_state = OCFS2_LA_UNUSED; osb->local_alloc_bh = NULL; - ocfs2_setup_hb_callbacks(osb); - init_waitqueue_head(&osb->osb_mount_event); osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL); |
