[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 ecb1067494f0..f6bac20af7aa 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");