freebsd-dev/sys/fs/nandfs/nandfs_dat.c

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/*-
* Copyright (c) 2010-2012 Semihalf.
* All rights reserved.
*
* 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mount.h>
#include <sys/mutex.h>
#include <sys/namei.h>
#include <sys/sysctl.h>
#include <sys/vnode.h>
#include <sys/buf.h>
#include <sys/bio.h>
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <vm/vm_kern.h>
#include <vm/vm_page.h>
#include <fs/nandfs/nandfs_mount.h>
#include <fs/nandfs/nandfs.h>
#include <fs/nandfs/nandfs_subr.h>
int
nandfs_vblock_alloc(struct nandfs_device *nandfsdev, nandfs_daddr_t *vblock)
{
struct nandfs_node *dat;
struct nandfs_mdt *mdt;
struct nandfs_alloc_request req;
struct nandfs_dat_entry *dat_entry;
uint64_t start;
uint32_t entry;
int locked, error;
dat = nandfsdev->nd_dat_node;
mdt = &nandfsdev->nd_dat_mdt;
start = nandfsdev->nd_last_cno + 1;
locked = NANDFS_VOP_ISLOCKED(NTOV(dat));
if (!locked)
VOP_LOCK(NTOV(dat), LK_EXCLUSIVE);
req.entrynum = 0;
/* Alloc vblock number */
error = nandfs_find_free_entry(mdt, dat, &req);
if (error) {
nandfs_error("%s: cannot find free vblk entry\n",
__func__);
if (!locked)
VOP_UNLOCK(NTOV(dat), 0);
return (error);
}
/* Read/create buffer */
error = nandfs_get_entry_block(mdt, dat, &req, &entry, 1);
if (error) {
nandfs_error("%s: cannot get free vblk entry\n",
__func__);
nandfs_abort_entry(&req);
if (!locked)
VOP_UNLOCK(NTOV(dat), 0);
return (error);
}
/* Fill out vblock data */
dat_entry = (struct nandfs_dat_entry *) req.bp_entry->b_data;
dat_entry[entry].de_start = start;
dat_entry[entry].de_end = UINTMAX_MAX;
dat_entry[entry].de_blocknr = 0;
/* Commit allocation */
error = nandfs_alloc_entry(mdt, &req);
if (error) {
nandfs_error("%s: cannot get free vblk entry\n",
__func__);
if (!locked)
VOP_UNLOCK(NTOV(dat), 0);
return (error);
}
/* Return allocated vblock */
*vblock = req.entrynum;
DPRINTF(DAT, ("%s: allocated vblock %#jx\n",
__func__, (uintmax_t)*vblock));
if (!locked)
VOP_UNLOCK(NTOV(dat), 0);
return (error);
}
int
nandfs_vblock_assign(struct nandfs_device *nandfsdev, nandfs_daddr_t vblock,
nandfs_lbn_t block)
{
struct nandfs_node *dat;
struct nandfs_mdt *mdt;
struct nandfs_alloc_request req;
struct nandfs_dat_entry *dat_entry;
uint32_t entry;
int locked, error;
dat = nandfsdev->nd_dat_node;
mdt = &nandfsdev->nd_dat_mdt;
locked = NANDFS_VOP_ISLOCKED(NTOV(dat));
if (!locked)
VOP_LOCK(NTOV(dat), LK_EXCLUSIVE);
req.entrynum = vblock;
error = nandfs_get_entry_block(mdt, dat, &req, &entry, 0);
if (!error) {
dat_entry = (struct nandfs_dat_entry *) req.bp_entry->b_data;
dat_entry[entry].de_blocknr = block;
DPRINTF(DAT, ("%s: assing vblock %jx->%jx\n",
__func__, (uintmax_t)vblock, (uintmax_t)block));
/*
* It is mostly called from syncer() so
* we want to force making buf dirty
*/
error = nandfs_dirty_buf(req.bp_entry, 1);
}
if (!locked)
VOP_UNLOCK(NTOV(dat), 0);
return (error);
}
int
nandfs_vblock_end(struct nandfs_device *nandfsdev, nandfs_daddr_t vblock)
{
struct nandfs_node *dat;
struct nandfs_mdt *mdt;
struct nandfs_alloc_request req;
struct nandfs_dat_entry *dat_entry;
uint64_t end;
uint32_t entry;
int locked, error;
dat = nandfsdev->nd_dat_node;
mdt = &nandfsdev->nd_dat_mdt;
end = nandfsdev->nd_last_cno;
locked = NANDFS_VOP_ISLOCKED(NTOV(dat));
if (!locked)
VOP_LOCK(NTOV(dat), LK_EXCLUSIVE);
req.entrynum = vblock;
error = nandfs_get_entry_block(mdt, dat, &req, &entry, 0);
if (!error) {
dat_entry = (struct nandfs_dat_entry *) req.bp_entry->b_data;
dat_entry[entry].de_end = end;
DPRINTF(DAT, ("%s: end vblock %#jx at checkpoint %#jx\n",
__func__, (uintmax_t)vblock, (uintmax_t)end));
/*
* It is mostly called from syncer() so
* we want to force making buf dirty
*/
error = nandfs_dirty_buf(req.bp_entry, 1);
}
if (!locked)
VOP_UNLOCK(NTOV(dat), 0);
return (error);
}
int
nandfs_vblock_free(struct nandfs_device *nandfsdev, nandfs_daddr_t vblock)
{
struct nandfs_node *dat;
struct nandfs_mdt *mdt;
struct nandfs_alloc_request req;
int error;
dat = nandfsdev->nd_dat_node;
mdt = &nandfsdev->nd_dat_mdt;
VOP_LOCK(NTOV(dat), LK_EXCLUSIVE);
req.entrynum = vblock;
error = nandfs_find_entry(mdt, dat, &req);
if (!error) {
DPRINTF(DAT, ("%s: vblk %#jx\n", __func__, (uintmax_t)vblock));
nandfs_free_entry(mdt, &req);
}
VOP_UNLOCK(NTOV(dat), 0);
return (error);
}
int
nandfs_get_dat_vinfo_ioctl(struct nandfs_device *nandfsdev, struct nandfs_argv *nargv)
{
struct nandfs_vinfo *vinfo;
size_t size;
int error;
if (nargv->nv_nmembs > NANDFS_VINFO_MAX)
return (EINVAL);
size = sizeof(struct nandfs_vinfo) * nargv->nv_nmembs;
vinfo = malloc(size, M_NANDFSTEMP, M_WAITOK|M_ZERO);
error = copyin((void *)(uintptr_t)nargv->nv_base, vinfo, size);
if (error) {
free(vinfo, M_NANDFSTEMP);
return (error);
}
error = nandfs_get_dat_vinfo(nandfsdev, vinfo, nargv->nv_nmembs);
if (error == 0)
error = copyout(vinfo, (void *)(uintptr_t)nargv->nv_base, size);
free(vinfo, M_NANDFSTEMP);
return (error);
}
int
nandfs_get_dat_vinfo(struct nandfs_device *nandfsdev, struct nandfs_vinfo *vinfo,
uint32_t nmembs)
{
struct nandfs_node *dat;
struct nandfs_mdt *mdt;
struct nandfs_alloc_request req;
struct nandfs_dat_entry *dat_entry;
uint32_t i, idx;
int error = 0;
dat = nandfsdev->nd_dat_node;
mdt = &nandfsdev->nd_dat_mdt;
DPRINTF(DAT, ("%s: nmembs %#x\n", __func__, nmembs));
VOP_LOCK(NTOV(dat), LK_EXCLUSIVE);
for (i = 0; i < nmembs; i++) {
req.entrynum = vinfo[i].nvi_vblocknr;
error = nandfs_get_entry_block(mdt, dat,&req, &idx, 0);
if (error)
break;
dat_entry = ((struct nandfs_dat_entry *) req.bp_entry->b_data);
vinfo[i].nvi_start = dat_entry[idx].de_start;
vinfo[i].nvi_end = dat_entry[idx].de_end;
vinfo[i].nvi_blocknr = dat_entry[idx].de_blocknr;
DPRINTF(DAT, ("%s: vinfo: %jx[%jx-%jx]->%jx\n",
__func__, vinfo[i].nvi_vblocknr, vinfo[i].nvi_start,
vinfo[i].nvi_end, vinfo[i].nvi_blocknr));
brelse(req.bp_entry);
}
VOP_UNLOCK(NTOV(dat), 0);
return (error);
}
int
nandfs_get_dat_bdescs_ioctl(struct nandfs_device *nffsdev,
struct nandfs_argv *nargv)
{
struct nandfs_bdesc *bd;
size_t size;
int error;
size = nargv->nv_nmembs * sizeof(struct nandfs_bdesc);
bd = malloc(size, M_NANDFSTEMP, M_WAITOK);
error = copyin((void *)(uintptr_t)nargv->nv_base, bd, size);
if (error) {
free(bd, M_NANDFSTEMP);
return (error);
}
error = nandfs_get_dat_bdescs(nffsdev, bd, nargv->nv_nmembs);
if (error == 0)
error = copyout(bd, (void *)(uintptr_t)nargv->nv_base, size);
free(bd, M_NANDFSTEMP);
return (error);
}
int
nandfs_get_dat_bdescs(struct nandfs_device *nffsdev, struct nandfs_bdesc *bd,
uint32_t nmembs)
{
struct nandfs_node *dat_node;
uint64_t map;
uint32_t i;
int error = 0;
dat_node = nffsdev->nd_dat_node;
VOP_LOCK(NTOV(dat_node), LK_EXCLUSIVE);
for (i = 0; i < nmembs; i++) {
DPRINTF(CLEAN,
("%s: bd ino:%#jx oblk:%#jx blocknr:%#jx off:%#jx\n",
__func__, (uintmax_t)bd[i].bd_ino,
(uintmax_t)bd[i].bd_oblocknr, (uintmax_t)bd[i].bd_blocknr,
(uintmax_t)bd[i].bd_offset));
error = nandfs_bmap_lookup(dat_node, bd[i].bd_offset, &map);
if (error)
break;
bd[i].bd_blocknr = map;
}
VOP_UNLOCK(NTOV(dat_node), 0);
return (error);
}