+++ /dev/null
-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
- * GPL HEADER START
- *
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 only,
- * as published by the Free Software Foundation.
- *
- * This program 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 version 2 for more details (a copy is included
- * in the LICENSE file that accompanied this code).
- *
- * You should have received a copy of the GNU General Public License
- * version 2 along with this program; If not, see
- * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
- *
- * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
- * CA 95054 USA or visit www.sun.com if you need additional information or
- * have any questions.
- *
- * GPL HEADER END
- */
-/*
- * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
- * Use is subject to license terms.
- */
-/*
- * This file is part of Lustre, http://www.lustre.org/
- * Lustre is a trademark of Sun Microsystems, Inc.
- *
- * lustre/lvfs/fsfilt_reiserfs.c
- *
- * Author: Andreas Dilger <adilger@clusterfs.com>
- */
-
-/*
- * NOTE - According to Hans Reiser, this could actually be implemented more
- * efficiently than creating a directory and putting ASCII objids in it.
- * Instead, we should return the reiserfs object ID as the lustre objid
- * (although I'm not sure what impact that would have on backup/restore).
- */
-
-#define DEBUG_SUBSYSTEM S_FILTER
-
-#include <linux/fs.h>
-#include <linux/slab.h>
-#include <linux/pagemap.h>
-#include <linux/quotaops.h>
-#include <linux/version.h>
-#include <linux/init.h>
-#include <asm/statfs.h>
-#include <libcfs/libcfs.h>
-#include <lustre_fsfilt.h>
-#include <obd.h>
-#include <linux/module.h>
-#include <linux/init.h>
-
-/* XXX We cannot include linux/reiserfs_fs.h here, because of symbols clash,
- but we need MAX_HEIGHT definition for proper reserve calculations
-#include <linux/reiserfs_fs.h>
-*/
-#define MAX_HEIGHT 5 /* maximal height of a tree. don't change this without
- changing JOURNAL_PER_BALANCE_CNT */
-
-static void *fsfilt_reiserfs_start(struct inode *inode, int op,
- void *desc_private, int logs)
-{
- return (void *)0xf00f00be;
-}
-
-static void *fsfilt_reiserfs_brw_start(int objcount, struct fsfilt_objinfo *fso,
- int niocount, struct niobuf_local *nb,
- void *desc_private, int logs)
-{
- return (void *)0xf00f00be;
-}
-
-static int fsfilt_reiserfs_commit(struct inode *inode, void *handle,
- int force_sync)
-{
- if (handle != (void *)0xf00f00be) {
- CERROR("bad handle %p", handle);
- return -EINVAL;
- }
-
- return 0;
-}
-
-static int fsfilt_reiserfs_setattr(struct dentry *dentry, void *handle,
- struct iattr *iattr, int do_trunc)
-{
- struct inode *inode = dentry->d_inode;
- int rc;
-
- cfs_lock_kernel();
-
- /* A _really_ horrible hack to avoid removing the data stored
- * in the block pointers; this is really the "small" stripe MD data.
- * We can avoid further hackery by virtue of the MDS file size being
- * zero all the time (which doesn't invoke block truncate at unlink
- * time), so we assert we never change the MDS file size from zero.
- */
- if (iattr->ia_valid & ATTR_SIZE && !do_trunc) {
- /* ATTR_SIZE would invoke truncate: clear it */
- iattr->ia_valid &= ~ATTR_SIZE;
- i_size_write(inode, iattr->ia_size);
-
- /* make sure _something_ gets set - so new inode
- * goes to disk (probably won't work over XFS
- */
- if (!iattr->ia_valid & ATTR_MODE) {
- iattr->ia_valid |= ATTR_MODE;
- iattr->ia_mode = inode->i_mode;
- }
- }
-
- /* We set these flags on the client, but have already checked perms
- * so don't confuse inode_change_ok. */
- iattr->ia_valid &= ~(ATTR_MTIME_SET | ATTR_ATIME_SET);
-
- if (inode->i_op->setattr) {
- rc = inode->i_op->setattr(dentry, iattr);
- } else {
- rc = inode_change_ok(inode, iattr);
- if (!rc)
- rc = inode_setattr(inode, iattr);
- }
-
- cfs_unlock_kernel();
-
- return rc;
-}
-
-static int fsfilt_reiserfs_set_md(struct inode *inode, void *handle,
- void *lmm, int lmm_size, const char *name)
-{
- /* XXX write stripe data into MDS file itself */
- CERROR("not implemented yet\n");
-
- return -ENOSYS;
-}
-
-static int fsfilt_reiserfs_get_md(struct inode *inode, void *lmm, int lmm_size,
- const char *name)
-{
- if (lmm == NULL)
- return i_size_read(inode);
-
- CERROR("not implemented yet\n");
- return -ENOSYS;
-}
-
-static ssize_t fsfilt_reiserfs_readpage(struct file *file, char *buf, size_t count,
- loff_t *offset)
-{
- return file->f_op->read(file, buf, count, offset);
-}
-
-static int fsfilt_reiserfs_add_journal_cb(struct obd_device *obd,
- __u64 last_rcvd, void *handle,
- fsfilt_cb_t cb_func, void *cb_data)
-{
- static unsigned long next = 0;
-
- if (cfs_time_after(jiffies, next)) {
- CERROR("no journal callback kernel patch, faking it...\n");
- next = jiffies + 300 * CFS_HZ;
- }
-
- cb_func(obd, last_rcvd, cb_data, 0);
-
- return 0;
-}
-
-static int fsfilt_reiserfs_statfs(struct super_block *sb,
- struct obd_statfs *osfs)
-{
- struct kstatfs sfs;
- int rc;
-
- memset(&sfs, 0, sizeof(sfs));
- rc = ll_do_statfs(sb, &sfs);
- statfs_pack(osfs, &sfs);
- return rc;
-}
-
-static int fsfilt_reiserfs_sync(struct super_block *sb)
-{
- return fsync_dev(sb->s_dev);
-}
-
-/* If fso is NULL, op is FSFILT operation, otherwise op is number of fso
- objects. Logs is number of logfiles to update */
-static int fsfilt_reiserfs_get_op_len(int op, struct fsfilt_objinfo *fso,
- int logs)
-{
- if ( !fso ) {
- switch(op) {
- case FSFILT_OP_CREATE:
- /* directory leaf, index & indirect & EA*/
- return MAX_HEIGHT + logs;
- case FSFILT_OP_UNLINK:
- return MAX_HEIGHT + logs;
- }
-
- } else {
- int i;
- int needed = MAX_HEIGHT;
- struct super_block *sb = fso->fso_dentry->d_inode->i_sb;
- int blockpp = 1 << (CFS_PAGE_SHIFT - sb->s_blocksize_bits);
- for (i = 0; i < op; i++, fso++) {
- int nblocks = fso->fso_bufcnt * blockpp;
-
- needed += nblocks;
- }
- return needed + logs;
- }
-
- return 0;
-}
-static struct fsfilt_operations fsfilt_reiserfs_ops = {
- .fs_type = "reiserfs",
- .fs_owner = THIS_MODULE,
- .fs_start = fsfilt_reiserfs_start,
- .fs_brw_start = fsfilt_reiserfs_brw_start,
- .fs_commit = fsfilt_reiserfs_commit,
- .fs_setattr = fsfilt_reiserfs_setattr,
- .fs_set_md = fsfilt_reiserfs_set_md,
- .fs_get_md = fsfilt_reiserfs_get_md,
- .fs_readpage = fsfilt_reiserfs_readpage,
- .fs_add_journal_cb = fsfilt_reiserfs_add_journal_cb,
- .fs_statfs = fsfilt_reiserfs_statfs,
- .fs_sync = fsfilt_reiserfs_sync,
- .fs_get_op_len = fsfilt_reiserfs_get_op_len,
-};
-
-static int __init fsfilt_reiserfs_init(void)
-{
- return fsfilt_register_ops(&fsfilt_reiserfs_ops);
-}
-
-static void __exit fsfilt_reiserfs_exit(void)
-{
- fsfilt_unregister_ops(&fsfilt_reiserfs_ops);
-}
-
-MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
-MODULE_DESCRIPTION("Lustre reiserfs Filesystem Helper v0.1");
-MODULE_LICENSE("GPL");
-
-module_init(fsfilt_reiserfs_init);
-module_exit(fsfilt_reiserfs_exit);
git://git.whamcloud.com / fs / lustre-release.git / commitdiff