[XFS] turn xlog helper macros into real functions

SGI-PV: 946205
SGI-Modid: xfs-linux-melb:xfs-kern:203360a

Signed-off-by: Christoph Hellwig <hch@sgi.com>
Signed-off-by: Nathan Scott <nathans@sgi.com>

1 files changed, 93 insertions, 20 deletions

diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c
index ecb1067494f..f6bac20af7a 100644
--- a/fs/xfs/xfs_log.c
+++ b/fs/xfs/xfs_log.c
@@ -178,6 +178,83 @@ xlog_trace_iclog(xlog_in_core_t *iclog, uint state)
 #define	xlog_trace_iclog(iclog,state)
 #endif /* XFS_LOG_TRACE */
 
+
+static void
+xlog_ins_ticketq(struct xlog_ticket **qp, struct xlog_ticket *tic)
+{
+	if (*qp) {
+		tic->t_next	    = (*qp);
+		tic->t_prev	    = (*qp)->t_prev;
+		(*qp)->t_prev->t_next = tic;
+		(*qp)->t_prev	    = tic;
+	} else {
+		tic->t_prev = tic->t_next = tic;
+		*qp = tic;
+	}
+
+	tic->t_flags |= XLOG_TIC_IN_Q;
+}
+
+static void
+xlog_del_ticketq(struct xlog_ticket **qp, struct xlog_ticket *tic)
+{
+	if (tic == tic->t_next) {
+		*qp = NULL;
+	} else {
+		*qp = tic->t_next;
+		tic->t_next->t_prev = tic->t_prev;
+		tic->t_prev->t_next = tic->t_next;
+	}
+
+	tic->t_next = tic->t_prev = NULL;
+	tic->t_flags &= ~XLOG_TIC_IN_Q;
+}
+
+static void
+xlog_grant_sub_space(struct log *log, int bytes)
+{
+	log->l_grant_write_bytes -= bytes;
+	if (log->l_grant_write_bytes < 0) {
+		log->l_grant_write_bytes += log->l_logsize;
+		log->l_grant_write_cycle--;
+	}
+
+	log->l_grant_reserve_bytes -= bytes;
+	if ((log)->l_grant_reserve_bytes < 0) {
+		log->l_grant_reserve_bytes += log->l_logsize;
+		log->l_grant_reserve_cycle--;
+	}
+
+}
+
+static void
+xlog_grant_add_space_write(struct log *log, int bytes)
+{
+	log->l_grant_write_bytes += bytes;
+	if (log->l_grant_write_bytes > log->l_logsize) {
+		log->l_grant_write_bytes -= log->l_logsize;
+		log->l_grant_write_cycle++;
+	}
+}
+
+static void
+xlog_grant_add_space_reserve(struct log *log, int bytes)
+{
+	log->l_grant_reserve_bytes += bytes;
+	if (log->l_grant_reserve_bytes > log->l_logsize) {
+		log->l_grant_reserve_bytes -= log->l_logsize;
+		log->l_grant_reserve_cycle++;
+	}
+}
+
+static inline void
+xlog_grant_add_space(struct log *log, int bytes)
+{
+	xlog_grant_add_space_write(log, bytes);
+	xlog_grant_add_space_reserve(log, bytes);
+}
+
+
 /*
  * NOTES:
  *
@@ -1320,8 +1397,7 @@ xlog_sync(xlog_t		*log,
 
 	/* move grant heads by roundoff in sync */
 	s = GRANT_LOCK(log);
-	XLOG_GRANT_ADD_SPACE(log, roundoff, 'w');
-	XLOG_GRANT_ADD_SPACE(log, roundoff, 'r');
+	xlog_grant_add_space(log, roundoff);
 	GRANT_UNLOCK(log, s);
 
 	/* put cycle number in every block */
@@ -2389,7 +2465,7 @@ xlog_grant_log_space(xlog_t	   *log,
 
 	/* something is already sleeping; insert new transaction at end */
 	if (log->l_reserve_headq) {
-		XLOG_INS_TICKETQ(log->l_reserve_headq, tic);
+		xlog_ins_ticketq(&log->l_reserve_headq, tic);
 		xlog_trace_loggrant(log, tic,
 				    "xlog_grant_log_space: sleep 1");
 		/*
@@ -2422,7 +2498,7 @@ redo:
 				     log->l_grant_reserve_bytes);
 	if (free_bytes < need_bytes) {
 		if ((tic->t_flags & XLOG_TIC_IN_Q) == 0)
-			XLOG_INS_TICKETQ(log->l_reserve_headq, tic);
+			xlog_ins_ticketq(&log->l_reserve_headq, tic);
 		xlog_trace_loggrant(log, tic,
 				    "xlog_grant_log_space: sleep 2");
 		XFS_STATS_INC(xs_sleep_logspace);
@@ -2439,11 +2515,10 @@ redo:
 		s = GRANT_LOCK(log);
 		goto redo;
 	} else if (tic->t_flags & XLOG_TIC_IN_Q)
-		XLOG_DEL_TICKETQ(log->l_reserve_headq, tic);
+		xlog_del_ticketq(&log->l_reserve_headq, tic);
 
 	/* we've got enough space */
-	XLOG_GRANT_ADD_SPACE(log, need_bytes, 'w');
-	XLOG_GRANT_ADD_SPACE(log, need_bytes, 'r');
+	xlog_grant_add_space(log, need_bytes);
 #ifdef DEBUG
 	tail_lsn = log->l_tail_lsn;
 	/*
@@ -2464,7 +2539,7 @@ redo:
 
  error_return:
 	if (tic->t_flags & XLOG_TIC_IN_Q)
-		XLOG_DEL_TICKETQ(log->l_reserve_headq, tic);
+		xlog_del_ticketq(&log->l_reserve_headq, tic);
 	xlog_trace_loggrant(log, tic, "xlog_grant_log_space: err_ret");
 	/*
 	 * If we are failing, make sure the ticket doesn't have any
@@ -2533,7 +2608,7 @@ xlog_regrant_write_log_space(xlog_t	   *log,
 
 		if (ntic != log->l_write_headq) {
 			if ((tic->t_flags & XLOG_TIC_IN_Q) == 0)
-				XLOG_INS_TICKETQ(log->l_write_headq, tic);
+				xlog_ins_ticketq(&log->l_write_headq, tic);
 
 			xlog_trace_loggrant(log, tic,
 				    "xlog_regrant_write_log_space: sleep 1");
@@ -2565,7 +2640,7 @@ redo:
 				     log->l_grant_write_bytes);
 	if (free_bytes < need_bytes) {
 		if ((tic->t_flags & XLOG_TIC_IN_Q) == 0)
-			XLOG_INS_TICKETQ(log->l_write_headq, tic);
+			xlog_ins_ticketq(&log->l_write_headq, tic);
 		XFS_STATS_INC(xs_sleep_logspace);
 		sv_wait(&tic->t_sema, PINOD|PLTWAIT, &log->l_grant_lock, s);
 
@@ -2581,9 +2656,10 @@ redo:
 		s = GRANT_LOCK(log);
 		goto redo;
 	} else if (tic->t_flags & XLOG_TIC_IN_Q)
-		XLOG_DEL_TICKETQ(log->l_write_headq, tic);
+		xlog_del_ticketq(&log->l_write_headq, tic);
 
-	XLOG_GRANT_ADD_SPACE(log, need_bytes, 'w'); /* we've got enough space */
+	/* we've got enough space */
+	xlog_grant_add_space_write(log, need_bytes);
 #ifdef DEBUG
 	tail_lsn = log->l_tail_lsn;
 	if (CYCLE_LSN(tail_lsn) != log->l_grant_write_cycle) {
@@ -2600,7 +2676,7 @@ redo:
 
  error_return:
 	if (tic->t_flags & XLOG_TIC_IN_Q)
-		XLOG_DEL_TICKETQ(log->l_reserve_headq, tic);
+		xlog_del_ticketq(&log->l_reserve_headq, tic);
 	xlog_trace_loggrant(log, tic, "xlog_regrant_write_log_space: err_ret");
 	/*
 	 * If we are failing, make sure the ticket doesn't have any
@@ -2633,8 +2709,7 @@ xlog_regrant_reserve_log_space(xlog_t	     *log,
 		ticket->t_cnt--;
 
 	s = GRANT_LOCK(log);
-	XLOG_GRANT_SUB_SPACE(log, ticket->t_curr_res, 'w');
-	XLOG_GRANT_SUB_SPACE(log, ticket->t_curr_res, 'r');
+	xlog_grant_sub_space(log, ticket->t_curr_res);
 	ticket->t_curr_res = ticket->t_unit_res;
 	XLOG_TIC_RESET_RES(ticket);
 	xlog_trace_loggrant(log, ticket,
@@ -2647,7 +2722,7 @@ xlog_regrant_reserve_log_space(xlog_t	     *log,
 		return;
 	}
 
-	XLOG_GRANT_ADD_SPACE(log, ticket->t_unit_res, 'r');
+	xlog_grant_add_space_reserve(log, ticket->t_unit_res);
 	xlog_trace_loggrant(log, ticket,
 			    "xlog_regrant_reserve_log_space: exit");
 	xlog_verify_grant_head(log, 0);
@@ -2683,8 +2758,7 @@ xlog_ungrant_log_space(xlog_t	     *log,
 	s = GRANT_LOCK(log);
 	xlog_trace_loggrant(log, ticket, "xlog_ungrant_log_space: enter");
 
-	XLOG_GRANT_SUB_SPACE(log, ticket->t_curr_res, 'w');
-	XLOG_GRANT_SUB_SPACE(log, ticket->t_curr_res, 'r');
+	xlog_grant_sub_space(log, ticket->t_curr_res);
 
 	xlog_trace_loggrant(log, ticket, "xlog_ungrant_log_space: sub current");
 
@@ -2693,8 +2767,7 @@ xlog_ungrant_log_space(xlog_t	     *log,
 	 */
 	if (ticket->t_cnt > 0) {
 		ASSERT(ticket->t_flags & XLOG_TIC_PERM_RESERV);
-		XLOG_GRANT_SUB_SPACE(log, ticket->t_unit_res*ticket->t_cnt,'w');
-		XLOG_GRANT_SUB_SPACE(log, ticket->t_unit_res*ticket->t_cnt,'r');
+		xlog_grant_sub_space(log, ticket->t_unit_res*ticket->t_cnt);
 	}
 
 	xlog_trace_loggrant(log, ticket, "xlog_ungrant_log_space: exit");