d65f6f7009
. common/include/arch/i386 is not actually an imported sys/arch/i386/include but leftover Minix files; remove and move to include/ . move include/ufs to sys/ufs, where it came from, now that we have a sys/ hierarchy . move mdocml/ to external/bsd/, now we have that . single sys/arch/i386/stand/ import for boot stuff
137 lines
4.8 KiB
C
137 lines
4.8 KiB
C
/* $NetBSD: chfs_erase.c,v 1.1 2011/11/24 15:51:31 ahoka Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 2010 Department of Software Engineering,
|
|
* University of Szeged, Hungary
|
|
* Copyright (c) 2010 David Tengeri <dtengeri@inf.u-szeged.hu>
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
|
* by the Department of Software Engineering, University of Szeged, Hungary
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
|
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
|
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
/*
|
|
* chfs_erase.c
|
|
*
|
|
* Copyright (C) 2010 David Tengeri <dtengeri@inf.u-szeged.hu>,
|
|
* ...
|
|
* University of Szeged, Hungary
|
|
*/
|
|
|
|
#include "chfs.h"
|
|
|
|
|
|
/**
|
|
* chfs_remap_leb - unmap and then map a leb
|
|
* @chmp: chfs mount structure
|
|
*
|
|
* This function gets an eraseblock from the erasable queue, unmaps it through
|
|
* EBH and maps another eraseblock to the same LNR.
|
|
* EBH will find a free eraseblock if any or will erase one if there isn't any
|
|
* free, just dirty block.
|
|
*
|
|
* Returns zero on case of success, errorcode otherwise.
|
|
*
|
|
* Needs more brainstorming here.
|
|
*/
|
|
int
|
|
chfs_remap_leb(struct chfs_mount *chmp)
|
|
{
|
|
int err;
|
|
struct chfs_eraseblock *cheb;
|
|
dbg("chfs_remap_leb\n");
|
|
uint32_t dirty, unchecked, used, free, wasted;
|
|
|
|
//dbg("chmp->chm_nr_erasable_blocks: %d\n", chmp->chm_nr_erasable_blocks);
|
|
//dbg("ltree: %p ecl: %p\n", &chmp->chm_ebh->ltree_lock, &chmp->chm_lock_sizes);
|
|
KASSERT(!rw_write_held(&chmp->chm_lock_wbuf));
|
|
KASSERT(mutex_owned(&chmp->chm_lock_mountfields));
|
|
KASSERT(mutex_owned(&chmp->chm_lock_sizes));
|
|
|
|
if (!chmp->chm_nr_erasable_blocks) {
|
|
//TODO
|
|
/* We don't have any erasable blocks, need to check if there are
|
|
* blocks on erasable_pending_wbuf_queue, flush the data and then
|
|
* we can remap it.
|
|
* If there aren't any blocks on that list too, we need to GC?
|
|
*/
|
|
if (!TAILQ_EMPTY(&chmp->chm_erasable_pending_wbuf_queue)) {
|
|
cheb = TAILQ_FIRST(&chmp->chm_erasable_pending_wbuf_queue);
|
|
TAILQ_REMOVE(&chmp->chm_erasable_pending_wbuf_queue, cheb, queue);
|
|
if (chmp->chm_wbuf_len) {
|
|
mutex_exit(&chmp->chm_lock_sizes);
|
|
chfs_flush_pending_wbuf(chmp);
|
|
mutex_enter(&chmp->chm_lock_sizes);
|
|
}
|
|
TAILQ_INSERT_TAIL(&chmp->chm_erase_pending_queue, cheb, queue);
|
|
chmp->chm_nr_erasable_blocks++;
|
|
} else {
|
|
/* We can't delete any block. */
|
|
//FIXME should we return ENOSPC?
|
|
return ENOSPC;
|
|
}
|
|
}
|
|
cheb = TAILQ_FIRST(&chmp->chm_erase_pending_queue);
|
|
TAILQ_REMOVE(&chmp->chm_erase_pending_queue, cheb, queue);
|
|
chmp->chm_nr_erasable_blocks--;
|
|
|
|
dirty = cheb->dirty_size;
|
|
unchecked = cheb->unchecked_size;
|
|
used = cheb->used_size;
|
|
free = cheb->free_size;
|
|
wasted = cheb->wasted_size;
|
|
|
|
// Free allocated node references for this eraseblock
|
|
chfs_free_node_refs(cheb);
|
|
|
|
err = chfs_unmap_leb(chmp, cheb->lnr);
|
|
if (err)
|
|
return err;
|
|
|
|
err = chfs_map_leb(chmp, cheb->lnr);
|
|
if (err)
|
|
return err;
|
|
// Reset state to default and change chmp sizes too
|
|
chfs_change_size_dirty(chmp, cheb, -dirty);
|
|
chfs_change_size_unchecked(chmp, cheb, -unchecked);
|
|
chfs_change_size_used(chmp, cheb, -used);
|
|
chfs_change_size_free(chmp, cheb, chmp->chm_ebh->eb_size - free);
|
|
chfs_change_size_wasted(chmp, cheb, -wasted);
|
|
|
|
KASSERT(cheb->dirty_size == 0);
|
|
KASSERT(cheb->unchecked_size == 0);
|
|
KASSERT(cheb->used_size == 0);
|
|
KASSERT(cheb->free_size == chmp->chm_ebh->eb_size);
|
|
KASSERT(cheb->wasted_size == 0);
|
|
|
|
cheb->first_node = NULL;
|
|
cheb->last_node = NULL;
|
|
//put it to free_queue
|
|
TAILQ_INSERT_TAIL(&chmp->chm_free_queue, cheb, queue);
|
|
chmp->chm_nr_free_blocks++;
|
|
dbg("remaped (free: %d, erasable: %d)\n", chmp->chm_nr_free_blocks, chmp->chm_nr_erasable_blocks);
|
|
KASSERT(!TAILQ_EMPTY(&chmp->chm_free_queue));
|
|
|
|
return 0;
|
|
}
|