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authorBoaz Harrosh <bharrosh@panasas.com>2008-10-27 19:37:02 +0300
committerBoaz Harrosh <bharrosh@panasas.com>2009-03-31 20:44:24 +0400
commite806271916ed6068a0e3e4e9298dff0688b88e0d (patch)
tree53669f4a55fecd82d289c035712d416e5b8dce35 /fs/exofs/file.c
parentb14f8ab2844987f013253dd04b708bde7fc1b52d (diff)
downloadlinux-e806271916ed6068a0e3e4e9298dff0688b88e0d.tar.xz
exofs: file and file_inode operations
implementation of the file_operations and inode_operations for regular data files. Most file_operations are generic vfs implementations except: - exofs_truncate will truncate the OSD object as well - Generic file_fsync is not good for none_bd devices so open code it - The default for .flush in Linux is todo nothing so call exofs_fsync on the file. Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
Diffstat (limited to 'fs/exofs/file.c')
-rw-r--r--fs/exofs/file.c87
1 files changed, 87 insertions, 0 deletions
diff --git a/fs/exofs/file.c b/fs/exofs/file.c
new file mode 100644
index 000000000000..6ed7fe484752
--- /dev/null
+++ b/fs/exofs/file.c
@@ -0,0 +1,87 @@
+/*
+ * Copyright (C) 2005, 2006
+ * Avishay Traeger (avishay@gmail.com) (avishay@il.ibm.com)
+ * Copyright (C) 2005, 2006
+ * International Business Machines
+ * Copyright (C) 2008, 2009
+ * Boaz Harrosh <bharrosh@panasas.com>
+ *
+ * Copyrights for code taken from ext2:
+ * Copyright (C) 1992, 1993, 1994, 1995
+ * Remy Card (card@masi.ibp.fr)
+ * Laboratoire MASI - Institut Blaise Pascal
+ * Universite Pierre et Marie Curie (Paris VI)
+ * from
+ * linux/fs/minix/inode.c
+ * Copyright (C) 1991, 1992 Linus Torvalds
+ *
+ * This file is part of exofs.
+ *
+ * exofs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation. Since it is based on ext2, and the only
+ * valid version of GPL for the Linux kernel is version 2, the only valid
+ * version of GPL for exofs is version 2.
+ *
+ * exofs is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with exofs; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <linux/buffer_head.h>
+
+#include "exofs.h"
+
+static int exofs_release_file(struct inode *inode, struct file *filp)
+{
+ return 0;
+}
+
+static int exofs_file_fsync(struct file *filp, struct dentry *dentry,
+ int datasync)
+{
+ int ret;
+ struct address_space *mapping = filp->f_mapping;
+
+ ret = filemap_write_and_wait(mapping);
+ if (ret)
+ return ret;
+
+ /*Note: file_fsync below also calles sync_blockdev, which is a no-op
+ * for exofs, but other then that it does sync_inode and
+ * sync_superblock which is what we need here.
+ */
+ return file_fsync(filp, dentry, datasync);
+}
+
+static int exofs_flush(struct file *file, fl_owner_t id)
+{
+ exofs_file_fsync(file, file->f_path.dentry, 1);
+ /* TODO: Flush the OSD target */
+ return 0;
+}
+
+const struct file_operations exofs_file_operations = {
+ .llseek = generic_file_llseek,
+ .read = do_sync_read,
+ .write = do_sync_write,
+ .aio_read = generic_file_aio_read,
+ .aio_write = generic_file_aio_write,
+ .mmap = generic_file_mmap,
+ .open = generic_file_open,
+ .release = exofs_release_file,
+ .fsync = exofs_file_fsync,
+ .flush = exofs_flush,
+ .splice_read = generic_file_splice_read,
+ .splice_write = generic_file_splice_write,
+};
+
+const struct inode_operations exofs_file_inode_operations = {
+ .truncate = exofs_truncate,
+ .setattr = exofs_setattr,
+};