From 32f105a123804c7882d447f013aeb3530b4d63c0 Mon Sep 17 00:00:00 2001 From: David Teigland Date: Wed, 23 Aug 2006 16:07:31 -0400 Subject: [PATCH] [DLM] down conversion clearing flags The down-conversion optimization was resulting in the lkb flags being cleared because the stub message reply had no flags value set. Copy the current flags into the stub message so they'll be copied back into the lkb as part of processing the fake reply. Also add an assertion to catch this error more directly if it exists elsewhere. Signed-off-by: David Teigland Signed-off-by: Steven Whitehouse --- fs/dlm/ast.c | 1 + fs/dlm/dlm_internal.h | 2 ++ fs/dlm/lock.c | 9 ++++----- 3 files changed, 7 insertions(+), 5 deletions(-) diff --git a/fs/dlm/ast.c b/fs/dlm/ast.c index a211330cbc..f91d39cb1e 100644 --- a/fs/dlm/ast.c +++ b/fs/dlm/ast.c @@ -38,6 +38,7 @@ void dlm_add_ast(struct dlm_lkb *lkb, int type) dlm_user_add_ast(lkb, type); return; } + DLM_ASSERT(lkb->lkb_astaddr != DLM_FAKE_USER_AST, dlm_print_lkb(lkb);); spin_lock(&ast_queue_lock); if (!(lkb->lkb_ast_type & (AST_COMP | AST_BAST))) { diff --git a/fs/dlm/dlm_internal.h b/fs/dlm/dlm_internal.h index da75099866..1e5cd67e1b 100644 --- a/fs/dlm/dlm_internal.h +++ b/fs/dlm/dlm_internal.h @@ -91,6 +91,8 @@ struct dlm_mhandle; } \ } +#define DLM_FAKE_USER_AST ERR_PTR(-EINVAL) + struct dlm_direntry { struct list_head list; diff --git a/fs/dlm/lock.c b/fs/dlm/lock.c index 6dcd475826..67247f0b50 100644 --- a/fs/dlm/lock.c +++ b/fs/dlm/lock.c @@ -86,8 +86,6 @@ static void __receive_convert_reply(struct dlm_rsb *r, struct dlm_lkb *lkb, struct dlm_message *ms); static int receive_extralen(struct dlm_message *ms); -#define FAKE_USER_AST (void*)0xff00ff00 - /* * Lock compatibilty matrix - thanks Steve * UN = Unlocked state. Not really a state, used as a flag @@ -2195,6 +2193,7 @@ static int send_convert(struct dlm_rsb *r, struct dlm_lkb *lkb) if (!error && down_conversion(lkb)) { remove_from_waiters(lkb); r->res_ls->ls_stub_ms.m_result = 0; + r->res_ls->ls_stub_ms.m_flags = lkb->lkb_flags; __receive_convert_reply(r, lkb, &r->res_ls->ls_stub_ms); } @@ -3615,7 +3614,7 @@ int dlm_user_request(struct dlm_ls *ls, struct dlm_user_args *ua, lock and that lkb_astparam is the dlm_user_args structure. */ error = set_lock_args(mode, &ua->lksb, flags, namelen, parent_lkid, - FAKE_USER_AST, ua, FAKE_USER_AST, &args); + DLM_FAKE_USER_AST, ua, DLM_FAKE_USER_AST, &args); lkb->lkb_flags |= DLM_IFL_USER; ua->old_mode = DLM_LOCK_IV; @@ -3686,8 +3685,8 @@ int dlm_user_convert(struct dlm_ls *ls, struct dlm_user_args *ua_tmp, ua->user_lksb = ua_tmp->user_lksb; ua->old_mode = lkb->lkb_grmode; - error = set_lock_args(mode, &ua->lksb, flags, 0, 0, FAKE_USER_AST, ua, - FAKE_USER_AST, &args); + error = set_lock_args(mode, &ua->lksb, flags, 0, 0, DLM_FAKE_USER_AST, + ua, DLM_FAKE_USER_AST, &args); if (error) goto out_put; -- 2.39.2