ocfs2: move downconvert worker to lockres ops

This way lock types don't have to manually pass it to
ocfs2_generic_unblock_lock().

Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>

1 files changed, 32 insertions, 18 deletions

diff --git a/fs/ocfs2/dlmglue.c b/fs/ocfs2/dlmglue.c
index 399d6e24b8d..d92756dcd47 100644
--- a/fs/ocfs2/dlmglue.c
+++ b/fs/ocfs2/dlmglue.c
@@ -71,7 +71,7 @@ static struct ocfs2_super *ocfs2_get_dentry_osb(struct ocfs2_lock_res *lockres);
 static struct ocfs2_super *ocfs2_get_inode_osb(struct ocfs2_lock_res *lockres);
 
 /*
- * Return value from ocfs2_convert_worker_t functions.
+ * Return value from ->downconvert_worker functions.
  *
  * These control the precise actions of ocfs2_generic_unblock_lock()
  * and ocfs2_process_blocked_lock()
@@ -98,16 +98,23 @@ static void ocfs2_set_meta_lvb(struct ocfs2_lock_res *lockres);
 
 static int ocfs2_unblock_data(struct ocfs2_lock_res *lockres,
                               struct ocfs2_unblock_ctl *ctl);
+static int ocfs2_data_convert_worker(struct ocfs2_lock_res *lockres,
+                                     int blocking);
+
 static int ocfs2_unblock_inode_lock(struct ocfs2_lock_res *lockres,
                                     struct ocfs2_unblock_ctl *ctl);
+
 static int ocfs2_unblock_dentry_lock(struct ocfs2_lock_res *lockres,
                                      struct ocfs2_unblock_ctl *ctl);
-static int ocfs2_unblock_osb_lock(struct ocfs2_lock_res *lockres,
-                                  struct ocfs2_unblock_ctl *ctl);
+static int ocfs2_dentry_convert_worker(struct ocfs2_lock_res *lockres,
+                                       int blocking);
 
 static void ocfs2_dentry_post_unlock(struct ocfs2_super *osb,
                                      struct ocfs2_lock_res *lockres);
 
+static int ocfs2_unblock_osb_lock(struct ocfs2_lock_res *lockres,
+                                  struct ocfs2_unblock_ctl *ctl);
+
 /*
  * OCFS2 Lock Resource Operations
  *
@@ -146,6 +153,17 @@ struct ocfs2_lock_res_ops {
         void (*set_lvb)(struct ocfs2_lock_res *);
 
         /*
+         * Called from the downconvert thread when it is determined
+         * that a lock will be downconverted. This is called without
+         * any locks held so the function can do work that might
+         * schedule (syncing out data, etc).
+         *
+         * This should return any one of the ocfs2_unblock_action
+         * values, depending on what it wants the thread to do.
+         */
+        int (*downconvert_worker)(struct ocfs2_lock_res *, int);
+
+        /*
          * LOCK_TYPE_* flags which describe the specific requirements
          * of a lock type. Descriptions of each individual flag follow.
          */
@@ -168,11 +186,9 @@ struct ocfs2_lock_res_ops {
  */
 #define LOCK_TYPE_USES_LVB              0x2
 
-typedef int (ocfs2_convert_worker_t)(struct ocfs2_lock_res *, int);
 static int ocfs2_generic_unblock_lock(struct ocfs2_super *osb,
                                       struct ocfs2_lock_res *lockres,
-                                      struct ocfs2_unblock_ctl *ctl,
-                                      ocfs2_convert_worker_t *worker);
+                                      struct ocfs2_unblock_ctl *ctl);
 
 static struct ocfs2_lock_res_ops ocfs2_inode_rw_lops = {
         .get_osb        = ocfs2_get_inode_osb,
@@ -191,6 +207,7 @@ static struct ocfs2_lock_res_ops ocfs2_inode_meta_lops = {
 static struct ocfs2_lock_res_ops ocfs2_inode_data_lops = {
         .get_osb        = ocfs2_get_inode_osb,
         .unblock        = ocfs2_unblock_data,
+        .downconvert_worker = ocfs2_data_convert_worker,
         .flags          = 0,
 };
 
@@ -208,6 +225,7 @@ static struct ocfs2_lock_res_ops ocfs2_dentry_lops = {
         .get_osb        = ocfs2_get_dentry_osb,
         .unblock        = ocfs2_unblock_dentry_lock,
         .post_unlock    = ocfs2_dentry_post_unlock,
+        .downconvert_worker = ocfs2_dentry_convert_worker,
         .flags          = 0,
 };
 
@@ -2537,8 +2555,7 @@ static int ocfs2_cancel_convert(struct ocfs2_super *osb,
 
 static int ocfs2_generic_unblock_lock(struct ocfs2_super *osb,
                                       struct ocfs2_lock_res *lockres,
-                                      struct ocfs2_unblock_ctl *ctl,
-                                      ocfs2_convert_worker_t *worker)
+                                      struct ocfs2_unblock_ctl *ctl)
 {
         unsigned long flags;
         int blocking;
@@ -2594,7 +2611,7 @@ recheck:
         /* If we get here, then we know that there are no more
          * incompatible holders (and anyone asking for an incompatible
          * lock is blocked). We can now downconvert the lock */
-        if (!worker)
+        if (!lockres->l_ops->downconvert_worker)
                 goto downconvert;
 
         /* Some lockres types want to do a bit of work before
@@ -2604,7 +2621,7 @@ recheck:
         blocking = lockres->l_blocking;
         spin_unlock_irqrestore(&lockres->l_lock, flags);
 
-        ctl->unblock_action = worker(lockres, blocking);
+        ctl->unblock_action = lockres->l_ops->downconvert_worker(lockres, blocking);
 
         if (ctl->unblock_action == UNBLOCK_STOP_POST)
                 goto leave;
@@ -2692,8 +2709,7 @@ int ocfs2_unblock_data(struct ocfs2_lock_res *lockres,
         mlog(0, "unblock inode %llu\n",
              (unsigned long long)OCFS2_I(inode)->ip_blkno);
 
-        status = ocfs2_generic_unblock_lock(osb, lockres, ctl,
-                                            ocfs2_data_convert_worker);
+        status = ocfs2_generic_unblock_lock(osb, lockres, ctl);
         if (status < 0)
                 mlog_errno(status);
 
@@ -2717,7 +2733,7 @@ static int ocfs2_unblock_inode_lock(struct ocfs2_lock_res *lockres,
         inode  = ocfs2_lock_res_inode(lockres);
 
         status = ocfs2_generic_unblock_lock(OCFS2_SB(inode->i_sb),
-                                            lockres, ctl, NULL);
+                                            lockres, ctl);
         if (status < 0)
                 mlog_errno(status);
 
@@ -2762,7 +2778,7 @@ static int ocfs2_unblock_meta(struct ocfs2_lock_res *lockres,
              (unsigned long long)OCFS2_I(inode)->ip_blkno);
 
         status = ocfs2_generic_unblock_lock(OCFS2_SB(inode->i_sb),
-                                            lockres, ctl, NULL);
+                                            lockres, ctl);
         if (status < 0)
                 mlog_errno(status);
 
@@ -2907,8 +2923,7 @@ static int ocfs2_unblock_dentry_lock(struct ocfs2_lock_res *lockres,
 
         ret = ocfs2_generic_unblock_lock(osb,
                                          lockres,
-                                         ctl,
-                                         ocfs2_dentry_convert_worker);
+                                         ctl);
         if (ret < 0)
                 mlog_errno(ret);
 
@@ -2933,8 +2948,7 @@ static int ocfs2_unblock_osb_lock(struct ocfs2_lock_res *lockres,
 
         status = ocfs2_generic_unblock_lock(osb,
                                             lockres,
-                                            ctl,
-                                            NULL);
+                                            ctl);
         if (status < 0)
                 mlog_errno(status);