dlm: proper types for asts and basts

Use proper types for ast and bast functions, and use
consistent type for ast param.

Signed-off-by: David Teigland <teigland@redhat.com>

4 files changed, 44 insertions, 33 deletions

diff --git a/fs/dlm/ast.c b/fs/dlm/ast.c
index 6308122890ca..8bf31e3fbf01 100644
--- a/fs/dlm/ast.c
+++ b/fs/dlm/ast.c
@@ -39,7 +39,6 @@ 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))) {
@@ -58,8 +57,8 @@ static void process_asts(void)
         struct dlm_ls *ls = NULL;
         struct dlm_rsb *r = NULL;
         struct dlm_lkb *lkb;
-        void (*cast) (long param);
-        void (*bast) (long param, int mode);
+        void (*cast) (void *astparam);
+        void (*bast) (void *astparam, int mode);
         int type = 0, found, bmode;
 
         for (;;) {
@@ -83,8 +82,8 @@ static void process_asts(void)
                 if (!found)
                         break;
 
-                cast = lkb->lkb_astaddr;
-                bast = lkb->lkb_bastaddr;
+                cast = lkb->lkb_astfn;
+                bast = lkb->lkb_bastfn;
                 bmode = lkb->lkb_bastmode;
 
                 if ((type & AST_COMP) && cast)
diff --git a/fs/dlm/dlm_internal.h b/fs/dlm/dlm_internal.h
index f7fbaec94b15..a53c237f310c 100644
--- a/fs/dlm/dlm_internal.h
+++ b/fs/dlm/dlm_internal.h
@@ -92,8 +92,6 @@ do { \
   } \
 }
 
-#define DLM_FAKE_USER_AST ERR_PTR(-EINVAL)
-
 
 struct dlm_direntry {
         struct list_head        list;
@@ -146,9 +144,9 @@ struct dlm_recover {
 
 struct dlm_args {
         uint32_t                flags;
-        void                    *astaddr;
-        long                    astparam;
-        void                    *bastaddr;
+        void                    (*astfn) (void *astparam);
+        void                    *astparam;
+        void                    (*bastfn) (void *astparam, int mode);
         int                     mode;
         struct dlm_lksb         *lksb;
         unsigned long           timeout;
@@ -253,9 +251,9 @@ struct dlm_lkb {
 
         char                    *lkb_lvbptr;
         struct dlm_lksb         *lkb_lksb;      /* caller's status block */
-        void                    *lkb_astaddr;   /* caller's ast function */
-        void                    *lkb_bastaddr;  /* caller's bast function */
-        long                    lkb_astparam;   /* caller's ast arg */
+        void                    (*lkb_astfn) (void *astparam);
+        void                    (*lkb_bastfn) (void *astparam, int mode);
+        void                    *lkb_astparam;  /* caller's ast arg */
 };
 
 
diff --git a/fs/dlm/lock.c b/fs/dlm/lock.c
index 5b82187e0221..94f8cbd3c0be 100644
--- a/fs/dlm/lock.c
+++ b/fs/dlm/lock.c
@@ -1781,7 +1781,7 @@ static void grant_pending_locks(struct dlm_rsb *r)
          */
 
         list_for_each_entry_safe(lkb, s, &r->res_grantqueue, lkb_statequeue) {
-                if (lkb->lkb_bastaddr && lock_requires_bast(lkb, high, cw)) {
+                if (lkb->lkb_bastfn && lock_requires_bast(lkb, high, cw)) {
                         if (cw && high == DLM_LOCK_PR)
                                 queue_bast(r, lkb, DLM_LOCK_CW);
                         else
@@ -1811,7 +1811,7 @@ static void send_bast_queue(struct dlm_rsb *r, struct list_head *head,
         struct dlm_lkb *gr;
 
         list_for_each_entry(gr, head, lkb_statequeue) {
-                if (gr->lkb_bastaddr && modes_require_bast(gr, lkb)) {
+                if (gr->lkb_bastfn && modes_require_bast(gr, lkb)) {
                         queue_bast(r, gr, lkb->lkb_rqmode);
                         gr->lkb_highbast = lkb->lkb_rqmode;
                 }
@@ -1966,8 +1966,11 @@ static void confirm_master(struct dlm_rsb *r, int error)
 }
 
 static int set_lock_args(int mode, struct dlm_lksb *lksb, uint32_t flags,
-                         int namelen, unsigned long timeout_cs, void *ast,
-                         void *astarg, void *bast, struct dlm_args *args)
+                         int namelen, unsigned long timeout_cs,
+                         void (*ast) (void *astparam),
+                         void *astparam,
+                         void (*bast) (void *astparam, int mode),
+                         struct dlm_args *args)
 {
         int rv = -EINVAL;
 
@@ -2017,9 +2020,9 @@ static int set_lock_args(int mode, struct dlm_lksb *lksb, uint32_t flags,
            an active lkb cannot be modified before locking the rsb */
 
         args->flags = flags;
-        args->astaddr = ast;
-        args->astparam = (long) astarg;
-        args->bastaddr = bast;
+        args->astfn = ast;
+        args->astparam = astparam;
+        args->bastfn = bast;
         args->timeout = timeout_cs;
         args->mode = mode;
         args->lksb = lksb;
@@ -2038,7 +2041,7 @@ static int set_unlock_args(uint32_t flags, void *astarg, struct dlm_args *args)
                 return -EINVAL;
 
         args->flags = flags;
-        args->astparam = (long) astarg;
+        args->astparam = astarg;
         return 0;
 }
 
@@ -2068,9 +2071,9 @@ static int validate_lock_args(struct dlm_ls *ls, struct dlm_lkb *lkb,
 
         lkb->lkb_exflags = args->flags;
         lkb->lkb_sbflags = 0;
-        lkb->lkb_astaddr = args->astaddr;
+        lkb->lkb_astfn = args->astfn;
         lkb->lkb_astparam = args->astparam;
-        lkb->lkb_bastaddr = args->bastaddr;
+        lkb->lkb_bastfn = args->bastfn;
         lkb->lkb_rqmode = args->mode;
         lkb->lkb_lksb = args->lksb;
         lkb->lkb_lvbptr = args->lksb->sb_lvbptr;
@@ -2717,9 +2720,9 @@ static void send_args(struct dlm_rsb *r, struct dlm_lkb *lkb,
         /* m_result and m_bastmode are set from function args,
            not from lkb fields */
 
-        if (lkb->lkb_bastaddr)
+        if (lkb->lkb_bastfn)
                 ms->m_asts |= AST_BAST;
-        if (lkb->lkb_astaddr)
+        if (lkb->lkb_astfn)
                 ms->m_asts |= AST_COMP;
 
         /* compare with switch in create_message; send_remove() doesn't
@@ -3002,6 +3005,16 @@ static int receive_lvb(struct dlm_ls *ls, struct dlm_lkb *lkb,
         return 0;
 }
 
+static void fake_bastfn(void *astparam, int mode)
+{
+        log_print("fake_bastfn should not be called");
+}
+
+static void fake_astfn(void *astparam)
+{
+        log_print("fake_astfn should not be called");
+}
+
 static int receive_request_args(struct dlm_ls *ls, struct dlm_lkb *lkb,
                                 struct dlm_message *ms)
 {
@@ -3010,8 +3023,9 @@ static int receive_request_args(struct dlm_ls *ls, struct dlm_lkb *lkb,
         lkb->lkb_remid = ms->m_lkid;
         lkb->lkb_grmode = DLM_LOCK_IV;
         lkb->lkb_rqmode = ms->m_rqmode;
-        lkb->lkb_bastaddr = (void *) (long) (ms->m_asts & AST_BAST);
-        lkb->lkb_astaddr = (void *) (long) (ms->m_asts & AST_COMP);
+
+        lkb->lkb_bastfn = (ms->m_asts & AST_BAST) ? &fake_bastfn : NULL;
+        lkb->lkb_astfn = (ms->m_asts & AST_COMP) ? &fake_astfn : NULL;
 
         if (lkb->lkb_exflags & DLM_LKF_VALBLK) {
                 /* lkb was just created so there won't be an lvb yet */
@@ -4291,8 +4305,8 @@ static int receive_rcom_lock_args(struct dlm_ls *ls, struct dlm_lkb *lkb,
         lkb->lkb_grmode = rl->rl_grmode;
         /* don't set lkb_status because add_lkb wants to itself */
 
-        lkb->lkb_bastaddr = (void *) (long) (rl->rl_asts & AST_BAST);
-        lkb->lkb_astaddr = (void *) (long) (rl->rl_asts & AST_COMP);
+        lkb->lkb_bastfn = (rl->rl_asts & AST_BAST) ? &fake_bastfn : NULL;
+        lkb->lkb_astfn = (rl->rl_asts & AST_COMP) ? &fake_astfn : NULL;
 
         if (lkb->lkb_exflags & DLM_LKF_VALBLK) {
                 int lvblen = rc->rc_header.h_length - sizeof(struct dlm_rcom) -
@@ -4466,7 +4480,7 @@ 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, timeout_cs,
-                              DLM_FAKE_USER_AST, ua, DLM_FAKE_USER_AST, &args);
+                              fake_astfn, ua, fake_bastfn, &args);
         lkb->lkb_flags |= DLM_IFL_USER;
         ua->old_mode = DLM_LOCK_IV;
 
@@ -4540,7 +4554,7 @@ int dlm_user_convert(struct dlm_ls *ls, struct dlm_user_args *ua_tmp,
         ua->old_mode = lkb->lkb_grmode;
 
         error = set_lock_args(mode, &ua->lksb, flags, 0, timeout_cs,
-                              DLM_FAKE_USER_AST, ua, DLM_FAKE_USER_AST, &args);
+                              fake_astfn, ua, fake_bastfn, &args);
         if (error)
                 goto out_put;
 
diff --git a/fs/dlm/rcom.c b/fs/dlm/rcom.c
index ef9d0f918492..035e6f9990b0 100644
--- a/fs/dlm/rcom.c
+++ b/fs/dlm/rcom.c
@@ -318,9 +318,9 @@ static void pack_rcom_lock(struct dlm_rsb *r, struct dlm_lkb *lkb,
         rl->rl_status = lkb->lkb_status;
         rl->rl_wait_type = cpu_to_le16(lkb->lkb_wait_type);
 
-        if (lkb->lkb_bastaddr)
+        if (lkb->lkb_bastfn)
                 rl->rl_asts |= AST_BAST;
-        if (lkb->lkb_astaddr)
+        if (lkb->lkb_astfn)
                 rl->rl_asts |= AST_COMP;
 
         rl->rl_namelen = cpu_to_le16(r->res_length);