ocfs2: update file system paths to set atime

Conditionally update atime in ocfs2_file_aio_read(), ocfs2_readdir() and
ocfs2_mmap().

Signed-off-by: Tiger Yang <tiger.yang@oracle.com>
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>

diff --git a/fs/ocfs2/dir.c b/fs/ocfs2/dir.c
index 5efea44..baad2aa 100644 (file)
--- a/fs/ocfs2/dir.c
+++ b/fs/ocfs2/dir.c
@@ -82,6 +82,7 @@ int ocfs2_readdir(struct file * filp, void * dirent, filldir_t filldir)
        struct inode *inode = filp->f_dentry->d_inode;
        struct super_block * sb = inode->i_sb;
        unsigned int ra_sectors = 16;
+       int lock_level = 0;
 
        mlog_entry("dirino=%llu\n",
                   (unsigned long long)OCFS2_I(inode)->ip_blkno);
@@ -89,7 +90,15 @@ int ocfs2_readdir(struct file * filp, void * dirent, filldir_t filldir)
        stored = 0;
        bh = NULL;
 
-       error = ocfs2_meta_lock(inode, NULL, 0);
+       error = ocfs2_meta_lock_atime(inode, filp->f_vfsmnt, &lock_level);
+       if (lock_level && error >= 0) {
+               /* We release EX lock which used to update atime
+                * and get PR lock again to reduce contention
+                * on commonly accessed directories. */
+               ocfs2_meta_unlock(inode, 1);
+               lock_level = 0;
+               error = ocfs2_meta_lock(inode, NULL, 0);
+       }
        if (error < 0) {
                if (error != -ENOENT)
                        mlog_errno(error);
@@ -198,7 +207,7 @@ revalidate:
 
        stored = 0;
 bail:
-       ocfs2_meta_unlock(inode, 0);
+       ocfs2_meta_unlock(inode, lock_level);
 
 bail_nolock:
        mlog_exit(stored);

diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index e82288f..b64ef7c 100644 (file)
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -1254,7 +1254,7 @@ static ssize_t ocfs2_file_aio_read(struct kiocb *iocb,
                                   unsigned long nr_segs,
                                   loff_t pos)
 {
-       int ret = 0, rw_level = -1, have_alloc_sem = 0;
+       int ret = 0, rw_level = -1, have_alloc_sem = 0, lock_level = 0;
        struct file *filp = iocb->ki_filp;
        struct inode *inode = filp->f_dentry->d_inode;
 
@@ -1296,12 +1296,12 @@ static ssize_t ocfs2_file_aio_read(struct kiocb *iocb,
         * like i_size. This allows the checks down below
         * generic_file_aio_read() a chance of actually working. 
         */
-       ret = ocfs2_meta_lock(inode, NULL, 0);
+       ret = ocfs2_meta_lock_atime(inode, filp->f_vfsmnt, &lock_level);
        if (ret < 0) {
                mlog_errno(ret);
                goto bail;
        }
-       ocfs2_meta_unlock(inode, 0);
+       ocfs2_meta_unlock(inode, lock_level);
 
        ret = generic_file_aio_read(iocb, iov, nr_segs, iocb->ki_pos);
        if (ret == -EINVAL)

diff --git a/fs/ocfs2/mmap.c b/fs/ocfs2/mmap.c
index 83934e3..69f85ae 100644 (file)
--- a/fs/ocfs2/mmap.c
+++ b/fs/ocfs2/mmap.c
@@ -82,6 +82,8 @@ static struct vm_operations_struct ocfs2_file_vm_ops = {
 
 int ocfs2_mmap(struct file *file, struct vm_area_struct *vma)
 {
+       int ret = 0, lock_level = 0;
+
        /* We don't want to support shared writable mappings yet. */
        if (((vma->vm_flags & VM_SHARED) || (vma->vm_flags & VM_MAYSHARE))
            && ((vma->vm_flags & VM_WRITE) || (vma->vm_flags & VM_MAYWRITE))) {
@@ -91,7 +93,14 @@ int ocfs2_mmap(struct file *file, struct vm_area_struct *vma)
                return -EINVAL;
        }
 
-       file_accessed(file);
+       ret = ocfs2_meta_lock_atime(file->f_dentry->d_inode,
+                                   file->f_vfsmnt, &lock_level);
+       if (ret < 0) {
+               mlog_errno(ret);
+               goto out;
+       }
+       ocfs2_meta_unlock(file->f_dentry->d_inode, lock_level);
+out:
        vma->vm_ops = &ocfs2_file_vm_ops;
        return 0;
 }

diff --git a/fs/ocfs2/symlink.c b/fs/ocfs2/symlink.c
index c0f68aa..957d687 100644 (file)
--- a/fs/ocfs2/symlink.c
+++ b/fs/ocfs2/symlink.c
@@ -126,6 +126,10 @@ static int ocfs2_readlink(struct dentry *dentry,
                goto out;
        }
 
+       /*
+        * Without vfsmount we can't update atime now,
+        * but we will update atime here ultimately.
+        */
        ret = vfs_readlink(dentry, buffer, buflen, link);
 
        brelse(bh);