1cea312ad4
Before when creating a new inode, we'd set the sb->s_dirt flag, and sometime later the system would write out s_nextid as part of the sb_info. Also on inode sync we would force the sb sync as well. Define the s_nextid as a new partition attribute and set it every time we create a new object. At mount we read it from it's new place. We now never set sb->s_dirt anywhere in exofs. write_super is actually never called. The call to exofs_write_super from exofs_put_super is also removed because the VFS always calls ->sync_fs before calling ->put_super twice. To stay backward-and-forward compatible we also write the old s_nextid in the super_block object at unmount, and support zero length attribute on mount. This also fixes a BUG where in layouts when group_width was not a divisor of EXOFS_SUPER_ID (0x10000) the s_nextid was not read from the device it was written to. Because of the sliding window layout trick, and because the read was always done from the 0 device but the write was done via the raid engine that might slide the device view. Now we read and write through the raid engine. Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
77 lines
2.3 KiB
C
77 lines
2.3 KiB
C
/*
|
|
* Copyright (C) 2005, 2006
|
|
* Avishay Traeger (avishay@gmail.com)
|
|
* 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 "exofs.h"
|
|
|
|
static int exofs_release_file(struct inode *inode, struct file *filp)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/* exofs_file_fsync - flush the inode to disk
|
|
*
|
|
* Note, in exofs all metadata is written as part of inode, regardless.
|
|
* The writeout is synchronous
|
|
*/
|
|
static int exofs_file_fsync(struct file *filp, int datasync)
|
|
{
|
|
int ret;
|
|
|
|
ret = sync_inode_metadata(filp->f_mapping->host, 1);
|
|
return ret;
|
|
}
|
|
|
|
static int exofs_flush(struct file *file, fl_owner_t id)
|
|
{
|
|
int ret = vfs_fsync(file, 0);
|
|
/* TODO: Flush the OSD target */
|
|
return ret;
|
|
}
|
|
|
|
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 = {
|
|
.setattr = exofs_setattr,
|
|
};
|