ocfs2/userdlm: Add tracing in userdlm

Make use of the newly added BASTS masklog to trace ASTs and BASTs in userdlm.

Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>

1 files changed, 25 insertions, 19 deletions

diff --git a/fs/ocfs2/dlmfs/userdlm.c b/fs/ocfs2/dlmfs/userdlm.c
index 2858ee6003c7..0499e3fb7bdb 100644
--- a/fs/ocfs2/dlmfs/userdlm.c
+++ b/fs/ocfs2/dlmfs/userdlm.c
@@ -128,8 +128,9 @@ static void user_ast(struct ocfs2_dlm_lksb *lksb)
         struct user_lock_res *lockres = user_lksb_to_lock_res(lksb);
         int status;
 
-        mlog(0, "AST fired for lockres %.*s\n", lockres->l_namelen,
-             lockres->l_name);
+        mlog(ML_BASTS, "AST fired for lockres %.*s, level %d => %d\n",
+             lockres->l_namelen, lockres->l_name, lockres->l_level,
+             lockres->l_requested);
 
         spin_lock(&lockres->l_lock);
 
@@ -214,8 +215,8 @@ static void user_bast(struct ocfs2_dlm_lksb *lksb, int level)
 {
         struct user_lock_res *lockres = user_lksb_to_lock_res(lksb);
 
-        mlog(0, "Blocking AST fired for lockres %.*s. Blocking level %d\n",
-             lockres->l_namelen, lockres->l_name, level);
+        mlog(ML_BASTS, "BAST fired for lockres %.*s, blocking %d, level %d\n",
+             lockres->l_namelen, lockres->l_name, level, lockres->l_level);
 
         spin_lock(&lockres->l_lock);
         lockres->l_flags |= USER_LOCK_BLOCKED;
@@ -232,8 +233,8 @@ static void user_unlock_ast(struct ocfs2_dlm_lksb *lksb, int status)
 {
         struct user_lock_res *lockres = user_lksb_to_lock_res(lksb);
 
-        mlog(0, "UNLOCK AST called on lock %.*s\n", lockres->l_namelen,
-             lockres->l_name);
+        mlog(ML_BASTS, "UNLOCK AST fired for lockres %.*s, flags 0x%x\n",
+             lockres->l_namelen, lockres->l_name, lockres->l_flags);
 
         if (status)
                 mlog(ML_ERROR, "dlm returns status %d\n", status);
@@ -302,8 +303,7 @@ static void user_dlm_unblock_lock(struct work_struct *work)
         struct ocfs2_cluster_connection *conn =
                 cluster_connection_from_user_lockres(lockres);
 
-        mlog(0, "processing lockres %.*s\n", lockres->l_namelen,
-             lockres->l_name);
+        mlog(0, "lockres %.*s\n", lockres->l_namelen, lockres->l_name);
 
         spin_lock(&lockres->l_lock);
 
@@ -321,17 +321,23 @@ static void user_dlm_unblock_lock(struct work_struct *work)
          * flag, and finally we might get another bast which re-queues
          * us before our ast for the downconvert is called. */
         if (!(lockres->l_flags & USER_LOCK_BLOCKED)) {
+                mlog(ML_BASTS, "lockres %.*s USER_LOCK_BLOCKED\n",
+                     lockres->l_namelen, lockres->l_name);
                 spin_unlock(&lockres->l_lock);
                 goto drop_ref;
         }
 
         if (lockres->l_flags & USER_LOCK_IN_TEARDOWN) {
+                mlog(ML_BASTS, "lockres %.*s USER_LOCK_IN_TEARDOWN\n",
+                     lockres->l_namelen, lockres->l_name);
                 spin_unlock(&lockres->l_lock);
                 goto drop_ref;
         }
 
         if (lockres->l_flags & USER_LOCK_BUSY) {
                 if (lockres->l_flags & USER_LOCK_IN_CANCEL) {
+                        mlog(ML_BASTS, "lockres %.*s USER_LOCK_IN_CANCEL\n",
+                             lockres->l_namelen, lockres->l_name);
                         spin_unlock(&lockres->l_lock);
                         goto drop_ref;
                 }
@@ -352,16 +358,18 @@ static void user_dlm_unblock_lock(struct work_struct *work)
         if ((lockres->l_blocking == DLM_LOCK_EX)
             && (lockres->l_ex_holders || lockres->l_ro_holders)) {
                 spin_unlock(&lockres->l_lock);
-                mlog(0, "can't downconvert for ex: ro = %u, ex = %u\n",
-                        lockres->l_ro_holders, lockres->l_ex_holders);
+                mlog(ML_BASTS, "lockres %.*s, EX/PR Holders %u,%u\n",
+                     lockres->l_namelen, lockres->l_name,
+                     lockres->l_ex_holders, lockres->l_ro_holders);
                 goto drop_ref;
         }
 
         if ((lockres->l_blocking == DLM_LOCK_PR)
             && lockres->l_ex_holders) {
                 spin_unlock(&lockres->l_lock);
-                mlog(0, "can't downconvert for pr: ex = %u\n",
-                        lockres->l_ex_holders);
+                mlog(ML_BASTS, "lockres %.*s, EX Holders %u\n",
+                     lockres->l_namelen, lockres->l_name,
+                     lockres->l_ex_holders);
                 goto drop_ref;
         }
 
@@ -369,8 +377,8 @@ static void user_dlm_unblock_lock(struct work_struct *work)
         new_level = user_highest_compat_lock_level(lockres->l_blocking);
         lockres->l_requested = new_level;
         lockres->l_flags |= USER_LOCK_BUSY;
-        mlog(0, "Downconvert lock from %d to %d\n",
-                lockres->l_level, new_level);
+        mlog(ML_BASTS, "lockres %.*s, downconvert %d => %d\n",
+             lockres->l_namelen, lockres->l_name, lockres->l_level, new_level);
         spin_unlock(&lockres->l_lock);
 
         /* need lock downconvert request now... */
@@ -430,10 +438,8 @@ int user_dlm_cluster_lock(struct user_lock_res *lockres,
                 goto bail;
         }
 
-        mlog(0, "lockres %.*s: asking for %s lock, passed flags = 0x%x\n",
-             lockres->l_namelen, lockres->l_name,
-             (level == DLM_LOCK_EX) ? "DLM_LOCK_EX" : "DLM_LOCK_PR",
-             lkm_flags);
+        mlog(ML_BASTS, "lockres %.*s, level %d, flags = 0x%x\n",
+             lockres->l_namelen, lockres->l_name, level, lkm_flags);
 
 again:
         if (signal_pending(current)) {
@@ -603,7 +609,7 @@ int user_dlm_destroy_lock(struct user_lock_res *lockres)
         struct ocfs2_cluster_connection *conn =
                 cluster_connection_from_user_lockres(lockres);
 
-        mlog(0, "asked to destroy %.*s\n", lockres->l_namelen, lockres->l_name);
+        mlog(ML_BASTS, "lockres %.*s\n", lockres->l_namelen, lockres->l_name);
 
         spin_lock(&lockres->l_lock);
         if (lockres->l_flags & USER_LOCK_IN_TEARDOWN) {