9P: introduction of a new cache=mmap model.

[karo-tx-linux.git] / fs / 9p / vfs_inode.c

diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index af7d531bdecdedcc4e7cef7a99dc36347b1c1163..bb7991c7e5c7f5d5d816977faba26117c004cef1 100644 (file)
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -299,15 +299,22 @@ int v9fs_init_inode(struct v9fs_session_info *v9ses,
        case S_IFREG:
                if (v9fs_proto_dotl(v9ses)) {
                        inode->i_op = &v9fs_file_inode_operations_dotl;
-                       if (v9ses->cache)
+                       if (v9ses->cache == CACHE_LOOSE ||
+                           v9ses->cache == CACHE_FSCACHE)
                                inode->i_fop =
                                        &v9fs_cached_file_operations_dotl;
+                       else if (v9ses->cache == CACHE_MMAP)
+                               inode->i_fop = &v9fs_mmap_file_operations_dotl;
                        else
                                inode->i_fop = &v9fs_file_operations_dotl;
                } else {
                        inode->i_op = &v9fs_file_inode_operations;
-                       if (v9ses->cache)
-                               inode->i_fop = &v9fs_cached_file_operations;
+                       if (v9ses->cache == CACHE_LOOSE ||
+                           v9ses->cache == CACHE_FSCACHE)
+                               inode->i_fop =
+                                       &v9fs_cached_file_operations;
+                       else if (v9ses->cache == CACHE_MMAP)
+                               inode->i_fop = &v9fs_mmap_file_operations;
                        else
                                inode->i_fop = &v9fs_file_operations;
                }
@@ -810,7 +817,7 @@ struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
         * unlink. For cached mode create calls request for new
         * inode. But with cache disabled, lookup should do this.
         */
-       if (v9ses->cache)
+       if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
                inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb);
        else
                inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
@@ -876,7 +883,8 @@ v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry,
        v9fs_invalidate_inode_attr(dir);
        v9inode = V9FS_I(dentry->d_inode);
        mutex_lock(&v9inode->v_mutex);
-       if (v9ses->cache && !v9inode->writeback_fid &&
+       if ((v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) &&
+           !v9inode->writeback_fid &&
            ((flags & O_ACCMODE) != O_RDONLY)) {
                /*
                 * clone a fid and add it to writeback_fid
@@ -899,7 +907,7 @@ v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry,
                goto error;
 
        file->private_data = fid;
-       if (v9ses->cache)
+       if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
                v9fs_cache_inode_set_cookie(dentry->d_inode, file);
 
        *opened |= FILE_CREATED;
@@ -1477,7 +1485,7 @@ int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode)
         */
        i_size = inode->i_size;
        v9fs_stat2inode(st, inode, inode->i_sb);
-       if (v9ses->cache)
+       if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
                inode->i_size = i_size;
        spin_unlock(&inode->i_lock);
 out: