1 files changed, 18 insertions, 4 deletions

diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index 77b4c04a280..bdadbae0909 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -1307,10 +1307,13 @@ bail:
         return err;
 }
 
-int ocfs2_permission(struct inode *inode, int mask)
+int ocfs2_permission(struct inode *inode, int mask, unsigned int flags)
 {
         int ret;
 
+        if (flags & IPERM_FLAG_RCU)
+                return -ECHILD;
+
         mlog_entry_void();
 
         ret = ocfs2_inode_lock(inode, NULL, 0);
@@ -1320,7 +1323,7 @@ int ocfs2_permission(struct inode *inode, int mask)
                 goto out;
         }
 
-        ret = generic_permission(inode, mask, ocfs2_check_acl);
+        ret = generic_permission(inode, mask, flags, ocfs2_check_acl);
 
         ocfs2_inode_unlock(inode, 0);
 out:
@@ -2241,11 +2244,15 @@ static ssize_t ocfs2_file_aio_write(struct kiocb *iocb,
 
         mutex_lock(&inode->i_mutex);
 
+        ocfs2_iocb_clear_sem_locked(iocb);
+
 relock:
         /* to match setattr's i_mutex -> i_alloc_sem -> rw_lock ordering */
         if (direct_io) {
                 down_read(&inode->i_alloc_sem);
                 have_alloc_sem = 1;
+                /* communicate with ocfs2_dio_end_io */
+                ocfs2_iocb_set_sem_locked(iocb);
         }
 
         /*
@@ -2382,8 +2389,10 @@ out:
                 ocfs2_rw_unlock(inode, rw_level);
 
 out_sems:
-        if (have_alloc_sem)
+        if (have_alloc_sem) {
                 up_read(&inode->i_alloc_sem);
+                ocfs2_iocb_clear_sem_locked(iocb);
+        }
 
         mutex_unlock(&inode->i_mutex);
 
@@ -2527,6 +2536,8 @@ static ssize_t ocfs2_file_aio_read(struct kiocb *iocb,
                 goto bail;
         }
 
+        ocfs2_iocb_clear_sem_locked(iocb);
+
         /*
          * buffered reads protect themselves in ->readpage().  O_DIRECT reads
          * need locks to protect pending reads from racing with truncate.
@@ -2534,6 +2545,7 @@ static ssize_t ocfs2_file_aio_read(struct kiocb *iocb,
         if (filp->f_flags & O_DIRECT) {
                 down_read(&inode->i_alloc_sem);
                 have_alloc_sem = 1;
+                ocfs2_iocb_set_sem_locked(iocb);
 
                 ret = ocfs2_rw_lock(inode, 0);
                 if (ret < 0) {
@@ -2575,8 +2587,10 @@ static ssize_t ocfs2_file_aio_read(struct kiocb *iocb,
         }
 
 bail:
-        if (have_alloc_sem)
+        if (have_alloc_sem) {
                 up_read(&inode->i_alloc_sem);
+                ocfs2_iocb_clear_sem_locked(iocb);
+        }
         if (rw_level != -1)
                 ocfs2_rw_unlock(inode, rw_level);
         mlog_exit(ret);