From 3b8118cffad224415c6f6f35abe7ca2a1d79c05a Mon Sep 17 00:00:00 2001 From: Kurt Hackel Date: Wed, 17 Jan 2007 17:05:53 -0800 Subject: ocfs2_dlm: Calling post handler function in assert master handler This patch prevents the dlm from sending the clear refmap message before the set refmap. We use the newly created post function handler routine to accomplish the task. Signed-off-by: Kurt Hackel Signed-off-by: Sunil Mushran Signed-off-by: Mark Fasheh --- fs/ocfs2/dlm/dlmcommon.h | 2 ++ fs/ocfs2/dlm/dlmdomain.c | 3 ++- fs/ocfs2/dlm/dlmmaster.c | 24 +++++++++++++++++++++--- fs/ocfs2/dlm/dlmthread.c | 4 ++++ 4 files changed, 29 insertions(+), 4 deletions(-) diff --git a/fs/ocfs2/dlm/dlmcommon.h b/fs/ocfs2/dlm/dlmcommon.h index 2df6fde..3f55471 100644 --- a/fs/ocfs2/dlm/dlmcommon.h +++ b/fs/ocfs2/dlm/dlmcommon.h @@ -224,6 +224,7 @@ static inline void __dlm_set_joining_node(struct dlm_ctxt *dlm, #define DLM_LOCK_RES_MIGRATING 0x00000020 #define DLM_LOCK_RES_DROPPING_REF 0x00000040 #define DLM_LOCK_RES_BLOCK_DIRTY 0x00001000 +#define DLM_LOCK_RES_SETREF_INPROG 0x00002000 /* max milliseconds to wait to sync up a network failure with a node death */ #define DLM_NODE_DEATH_WAIT_MAX (5 * 1000) @@ -879,6 +880,7 @@ int dlm_master_request_handler(struct o2net_msg *msg, u32 len, void *data, void **ret_data); int dlm_assert_master_handler(struct o2net_msg *msg, u32 len, void *data, void **ret_data); +void dlm_assert_master_post_handler(int status, void *data, void *ret_data); int dlm_deref_lockres_handler(struct o2net_msg *msg, u32 len, void *data, void **ret_data); int dlm_migrate_request_handler(struct o2net_msg *msg, u32 len, void *data, diff --git a/fs/ocfs2/dlm/dlmdomain.c b/fs/ocfs2/dlm/dlmdomain.c index 8a208b0..6590e1b 100644 --- a/fs/ocfs2/dlm/dlmdomain.c +++ b/fs/ocfs2/dlm/dlmdomain.c @@ -1101,7 +1101,8 @@ static int dlm_register_domain_handlers(struct dlm_ctxt *dlm) status = o2net_register_handler(DLM_ASSERT_MASTER_MSG, dlm->key, sizeof(struct dlm_assert_master), dlm_assert_master_handler, - dlm, NULL, &dlm->dlm_domain_handlers); + dlm, dlm_assert_master_post_handler, + &dlm->dlm_domain_handlers); if (status) goto bail; diff --git a/fs/ocfs2/dlm/dlmmaster.c b/fs/ocfs2/dlm/dlmmaster.c index bd12687..84f36db 100644 --- a/fs/ocfs2/dlm/dlmmaster.c +++ b/fs/ocfs2/dlm/dlmmaster.c @@ -2036,8 +2036,12 @@ ok: done: ret = 0; - if (res) - dlm_lockres_put(res); + if (res) { + spin_lock(&res->spinlock); + res->state |= DLM_LOCK_RES_SETREF_INPROG; + spin_unlock(&res->spinlock); + *ret_data = (void *)res; + } dlm_put(dlm); if (master_request) { mlog(0, "need to tell master to reassert\n"); @@ -2064,11 +2068,25 @@ kill: __dlm_print_one_lock_resource(res); spin_unlock(&res->spinlock); spin_unlock(&dlm->spinlock); - dlm_lockres_put(res); + *ret_data = (void *)res; dlm_put(dlm); return -EINVAL; } +void dlm_assert_master_post_handler(int status, void *data, void *ret_data) +{ + struct dlm_lock_resource *res = (struct dlm_lock_resource *)ret_data; + + if (ret_data) { + spin_lock(&res->spinlock); + res->state &= ~DLM_LOCK_RES_SETREF_INPROG; + spin_unlock(&res->spinlock); + wake_up(&res->wq); + dlm_lockres_put(res); + } + return; +} + int dlm_dispatch_assert_master(struct dlm_ctxt *dlm, struct dlm_lock_resource *res, int ignore_higher, u8 request_from, u32 flags) diff --git a/fs/ocfs2/dlm/dlmthread.c b/fs/ocfs2/dlm/dlmthread.c index 3b94e4d..8ffa091 100644 --- a/fs/ocfs2/dlm/dlmthread.c +++ b/fs/ocfs2/dlm/dlmthread.c @@ -176,6 +176,10 @@ static int dlm_purge_lockres(struct dlm_ctxt *dlm, res->lockname.name, master); if (!master) { + spin_lock(&res->spinlock); + /* This ensures that clear refmap is sent after the set */ + __dlm_wait_on_lockres_flags(res, DLM_LOCK_RES_SETREF_INPROG); + spin_unlock(&res->spinlock); /* drop spinlock to do messaging, retake below */ spin_unlock(&dlm->spinlock); /* clear our bit from the master's refmap, ignore errors */ -- cgit v1.1