mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-24 11:29:10 +00:00
db702c59cf
Approved by: cperciva MFC after: 1 week
1121 lines
26 KiB
C
1121 lines
26 KiB
C
/*-
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* Copyright (c) 2010-2012 Semihalf
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* Copyright (c) 2008, 2009 Reinoud Zandijk
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* From: NetBSD: nilfs_subr.c,v 1.4 2009/07/29 17:06:57 reinoud
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/namei.h>
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#include <sys/resourcevar.h>
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#include <sys/kernel.h>
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#include <sys/file.h>
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#include <sys/stat.h>
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#include <sys/buf.h>
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#include <sys/bio.h>
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#include <sys/proc.h>
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#include <sys/mount.h>
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#include <sys/vnode.h>
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#include <sys/signalvar.h>
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#include <sys/malloc.h>
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#include <sys/dirent.h>
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#include <sys/lockf.h>
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#include <sys/libkern.h>
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#include <geom/geom.h>
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#include <geom/geom_vfs.h>
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#include <vm/vm.h>
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#include <vm/vm_extern.h>
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#include <machine/_inttypes.h>
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#include "nandfs_mount.h"
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#include "nandfs.h"
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#include "nandfs_subr.h"
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MALLOC_DEFINE(M_NANDFSMNT, "nandfs_mount", "NANDFS mount");
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MALLOC_DEFINE(M_NANDFSTEMP, "nandfs_tmt", "NANDFS tmp");
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uma_zone_t nandfs_node_zone;
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void nandfs_bdflush(struct bufobj *bo, struct buf *bp);
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int nandfs_bufsync(struct bufobj *bo, int waitfor);
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struct buf_ops buf_ops_nandfs = {
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.bop_name = "buf_ops_nandfs",
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.bop_write = bufwrite,
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.bop_strategy = bufstrategy,
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.bop_sync = nandfs_bufsync,
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.bop_bdflush = nandfs_bdflush,
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};
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int
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nandfs_bufsync(struct bufobj *bo, int waitfor)
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{
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struct vnode *vp;
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int error = 0;
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vp = bo->__bo_vnode;
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ASSERT_VOP_LOCKED(vp, __func__);
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error = nandfs_sync_file(vp);
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if (error)
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nandfs_warning("%s: cannot flush buffers err:%d\n",
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__func__, error);
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return (error);
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}
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void
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nandfs_bdflush(bo, bp)
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struct bufobj *bo;
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struct buf *bp;
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{
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struct vnode *vp;
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int error;
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if (bo->bo_dirty.bv_cnt <= ((dirtybufthresh * 8) / 10))
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return;
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vp = bp->b_vp;
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if (NANDFS_SYS_NODE(VTON(vp)->nn_ino))
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return;
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if (NANDFS_IS_INDIRECT(bp))
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return;
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error = nandfs_sync_file(vp);
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if (error)
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nandfs_warning("%s: cannot flush buffers err:%d\n",
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__func__, error);
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}
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int
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nandfs_init(struct vfsconf *vfsp)
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{
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nandfs_node_zone = uma_zcreate("nandfs node zone",
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sizeof(struct nandfs_node), NULL, NULL, NULL, NULL, 0, 0);
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return (0);
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}
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int
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nandfs_uninit(struct vfsconf *vfsp)
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{
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uma_zdestroy(nandfs_node_zone);
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return (0);
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}
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/* Basic calculators */
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uint64_t
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nandfs_get_segnum_of_block(struct nandfs_device *nandfsdev,
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nandfs_daddr_t blocknr)
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{
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uint64_t segnum, blks_per_seg;
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MPASS(blocknr >= nandfsdev->nd_fsdata.f_first_data_block);
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blks_per_seg = nandfsdev->nd_fsdata.f_blocks_per_segment;
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segnum = blocknr / blks_per_seg;
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segnum -= nandfsdev->nd_fsdata.f_first_data_block / blks_per_seg;
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DPRINTF(SYNC, ("%s: returning blocknr %jx -> segnum %jx\n", __func__,
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blocknr, segnum));
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return (segnum);
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}
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void
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nandfs_get_segment_range(struct nandfs_device *nandfsdev, uint64_t segnum,
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uint64_t *seg_start, uint64_t *seg_end)
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{
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uint64_t blks_per_seg;
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blks_per_seg = nandfsdev->nd_fsdata.f_blocks_per_segment;
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*seg_start = nandfsdev->nd_fsdata.f_first_data_block +
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blks_per_seg * segnum;
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if (seg_end != NULL)
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*seg_end = *seg_start + blks_per_seg -1;
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}
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void nandfs_calc_mdt_consts(struct nandfs_device *nandfsdev,
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struct nandfs_mdt *mdt, int entry_size)
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{
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uint32_t blocksize = nandfsdev->nd_blocksize;
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mdt->entries_per_group = blocksize * 8;
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mdt->entries_per_block = blocksize / entry_size;
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mdt->blocks_per_group =
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(mdt->entries_per_group -1) / mdt->entries_per_block + 1 + 1;
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mdt->groups_per_desc_block =
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blocksize / sizeof(struct nandfs_block_group_desc);
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mdt->blocks_per_desc_block =
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mdt->groups_per_desc_block * mdt->blocks_per_group + 1;
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}
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int
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nandfs_dev_bread(struct nandfs_device *nandfsdev, nandfs_lbn_t blocknr,
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struct ucred *cred, int flags, struct buf **bpp)
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{
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int blk2dev = nandfsdev->nd_blocksize / DEV_BSIZE;
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int error;
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DPRINTF(BLOCK, ("%s: read from block %jx vp %p\n", __func__,
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blocknr * blk2dev, nandfsdev->nd_devvp));
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error = bread(nandfsdev->nd_devvp, blocknr * blk2dev,
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nandfsdev->nd_blocksize, NOCRED, bpp);
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if (error)
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nandfs_error("%s: cannot read from device - blk:%jx\n",
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__func__, blocknr);
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return (error);
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}
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/* Read on a node */
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int
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nandfs_bread(struct nandfs_node *node, nandfs_lbn_t blocknr,
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struct ucred *cred, int flags, struct buf **bpp)
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{
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nandfs_daddr_t vblk;
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int error;
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DPRINTF(BLOCK, ("%s: vp:%p lbn:%#jx\n", __func__, NTOV(node),
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blocknr));
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error = bread(NTOV(node), blocknr, node->nn_nandfsdev->nd_blocksize,
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cred, bpp);
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KASSERT(error == 0, ("%s: vp:%p lbn:%#jx err:%d\n", __func__,
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NTOV(node), blocknr, error));
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if (!nandfs_vblk_get(*bpp) &&
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((*bpp)->b_flags & B_CACHE) && node->nn_ino != NANDFS_DAT_INO) {
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nandfs_bmap_lookup(node, blocknr, &vblk);
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nandfs_vblk_set(*bpp, vblk);
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}
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return (error);
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}
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int
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nandfs_bread_meta(struct nandfs_node *node, nandfs_lbn_t blocknr,
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struct ucred *cred, int flags, struct buf **bpp)
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{
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nandfs_daddr_t vblk;
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int error;
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DPRINTF(BLOCK, ("%s: vp:%p lbn:%#jx\n", __func__, NTOV(node),
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blocknr));
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error = bread(NTOV(node), blocknr, node->nn_nandfsdev->nd_blocksize,
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cred, bpp);
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KASSERT(error == 0, ("%s: vp:%p lbn:%#jx err:%d\n", __func__,
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NTOV(node), blocknr, error));
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if (!nandfs_vblk_get(*bpp) &&
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((*bpp)->b_flags & B_CACHE) && node->nn_ino != NANDFS_DAT_INO) {
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nandfs_bmap_lookup(node, blocknr, &vblk);
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nandfs_vblk_set(*bpp, vblk);
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}
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return (error);
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}
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int
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nandfs_bdestroy(struct nandfs_node *node, nandfs_daddr_t vblk)
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{
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int error;
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if (!NANDFS_SYS_NODE(node->nn_ino))
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NANDFS_WRITEASSERT(node->nn_nandfsdev);
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error = nandfs_vblock_end(node->nn_nandfsdev, vblk);
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if (error) {
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nandfs_error("%s: ending vblk: %jx failed\n",
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__func__, (uintmax_t)vblk);
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return (error);
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}
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node->nn_inode.i_blocks--;
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return (0);
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}
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int
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nandfs_bcreate(struct nandfs_node *node, nandfs_lbn_t blocknr,
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struct ucred *cred, int flags, struct buf **bpp)
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{
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int error;
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ASSERT_VOP_LOCKED(NTOV(node), __func__);
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if (!NANDFS_SYS_NODE(node->nn_ino))
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NANDFS_WRITEASSERT(node->nn_nandfsdev);
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DPRINTF(BLOCK, ("%s: vp:%p lbn:%#jx\n", __func__, NTOV(node),
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blocknr));
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*bpp = getblk(NTOV(node), blocknr, node->nn_nandfsdev->nd_blocksize,
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0, 0, 0);
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KASSERT((*bpp), ("%s: vp:%p lbn:%#jx\n", __func__,
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NTOV(node), blocknr));
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if (*bpp) {
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vfs_bio_clrbuf(*bpp);
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(*bpp)->b_blkno = ~(0); /* To avoid VOP_BMAP in bdwrite */
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error = nandfs_bmap_insert_block(node, blocknr, *bpp);
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if (error) {
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nandfs_warning("%s: failed bmap insert node:%p"
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" blk:%jx\n", __func__, node, blocknr);
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brelse(*bpp);
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return (error);
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}
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node->nn_inode.i_blocks++;
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return (0);
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}
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return (-1);
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}
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int
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nandfs_bcreate_meta(struct nandfs_node *node, nandfs_lbn_t blocknr,
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struct ucred *cred, int flags, struct buf **bpp)
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{
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struct nandfs_device *fsdev;
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nandfs_daddr_t vblk;
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int error;
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ASSERT_VOP_LOCKED(NTOV(node), __func__);
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NANDFS_WRITEASSERT(node->nn_nandfsdev);
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DPRINTF(BLOCK, ("%s: vp:%p lbn:%#jx\n", __func__, NTOV(node),
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blocknr));
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fsdev = node->nn_nandfsdev;
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*bpp = getblk(NTOV(node), blocknr, node->nn_nandfsdev->nd_blocksize,
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0, 0, 0);
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KASSERT((*bpp), ("%s: vp:%p lbn:%#jx\n", __func__,
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NTOV(node), blocknr));
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memset((*bpp)->b_data, 0, fsdev->nd_blocksize);
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vfs_bio_clrbuf(*bpp);
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(*bpp)->b_blkno = ~(0); /* To avoid VOP_BMAP in bdwrite */
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nandfs_buf_set(*bpp, NANDFS_VBLK_ASSIGNED);
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if (node->nn_ino != NANDFS_DAT_INO) {
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error = nandfs_vblock_alloc(fsdev, &vblk);
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if (error) {
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nandfs_buf_clear(*bpp, NANDFS_VBLK_ASSIGNED);
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brelse(*bpp);
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return (error);
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}
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} else
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vblk = fsdev->nd_fakevblk++;
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nandfs_vblk_set(*bpp, vblk);
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nandfs_bmap_insert_block(node, blocknr, *bpp);
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return (0);
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}
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/* Translate index to a file block number and an entry */
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void
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nandfs_mdt_trans(struct nandfs_mdt *mdt, uint64_t index,
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nandfs_lbn_t *blocknr, uint32_t *entry_in_block)
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{
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uint64_t blknr;
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uint64_t group, group_offset, blocknr_in_group;
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uint64_t desc_block, desc_offset;
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/* Calculate our offset in the file */
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group = index / mdt->entries_per_group;
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group_offset = index % mdt->entries_per_group;
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desc_block = group / mdt->groups_per_desc_block;
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desc_offset = group % mdt->groups_per_desc_block;
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blocknr_in_group = group_offset / mdt->entries_per_block;
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/* To descgroup offset */
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blknr = 1 + desc_block * mdt->blocks_per_desc_block;
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/* To group offset */
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blknr += desc_offset * mdt->blocks_per_group;
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/* To actual file block */
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blknr += 1 + blocknr_in_group;
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*blocknr = blknr;
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*entry_in_block = group_offset % mdt->entries_per_block;
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}
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void
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nandfs_mdt_trans_blk(struct nandfs_mdt *mdt, uint64_t index,
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uint64_t *desc, uint64_t *bitmap, nandfs_lbn_t *blocknr,
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uint32_t *entry_in_block)
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{
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uint64_t blknr;
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uint64_t group, group_offset, blocknr_in_group;
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uint64_t desc_block, desc_offset;
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/* Calculate our offset in the file */
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group = index / mdt->entries_per_group;
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group_offset = index % mdt->entries_per_group;
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desc_block = group / mdt->groups_per_desc_block;
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desc_offset = group % mdt->groups_per_desc_block;
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blocknr_in_group = group_offset / mdt->entries_per_block;
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/* To descgroup offset */
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*desc = desc_block * mdt->blocks_per_desc_block;
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blknr = 1 + desc_block * mdt->blocks_per_desc_block;
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/* To group offset */
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blknr += desc_offset * mdt->blocks_per_group;
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*bitmap = blknr;
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/* To actual file block */
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blknr += 1 + blocknr_in_group;
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*blocknr = blknr;
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*entry_in_block = group_offset % mdt->entries_per_block;
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DPRINTF(ALLOC,
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("%s: desc_buf: %jx bitmap_buf: %jx entry_buf: %jx entry: %x\n",
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__func__, (uintmax_t)*desc, (uintmax_t)*bitmap,
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(uintmax_t)*blocknr, *entry_in_block));
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}
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int
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nandfs_vtop(struct nandfs_node *node, nandfs_daddr_t vblocknr,
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nandfs_daddr_t *pblocknr)
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{
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struct nandfs_node *dat_node;
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struct nandfs_dat_entry *entry;
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struct buf *bp;
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nandfs_lbn_t ldatblknr;
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uint32_t entry_in_block;
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int locked, error;
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if (node->nn_ino == NANDFS_DAT_INO || node->nn_ino == NANDFS_GC_INO) {
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*pblocknr = vblocknr;
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return (0);
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}
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/* only translate valid vblocknrs */
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if (vblocknr == 0)
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return (0);
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dat_node = node->nn_nandfsdev->nd_dat_node;
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nandfs_mdt_trans(&node->nn_nandfsdev->nd_dat_mdt, vblocknr, &ldatblknr,
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&entry_in_block);
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locked = NANDFS_VOP_ISLOCKED(NTOV(dat_node));
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if (!locked)
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VOP_LOCK(NTOV(dat_node), LK_SHARED);
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error = nandfs_bread(dat_node, ldatblknr, NOCRED, 0, &bp);
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if (error) {
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DPRINTF(TRANSLATE, ("vtop: can't read in DAT block %#jx!\n",
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(uintmax_t)ldatblknr));
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brelse(bp);
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VOP_UNLOCK(NTOV(dat_node), 0);
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return (error);
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}
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/* Get our translation */
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entry = ((struct nandfs_dat_entry *) bp->b_data) + entry_in_block;
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DPRINTF(TRANSLATE, ("\tentry %p data %p entry_in_block %x\n",
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entry, bp->b_data, entry_in_block))
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DPRINTF(TRANSLATE, ("\tvblk %#jx -> %#jx for cp [%#jx-%#jx]\n",
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(uintmax_t)vblocknr, (uintmax_t)entry->de_blocknr,
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(uintmax_t)entry->de_start, (uintmax_t)entry->de_end));
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*pblocknr = entry->de_blocknr;
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brelse(bp);
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if (!locked)
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VOP_UNLOCK(NTOV(dat_node), 0);
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MPASS(*pblocknr >= node->nn_nandfsdev->nd_fsdata.f_first_data_block ||
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*pblocknr == 0);
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return (0);
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}
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int
|
|
nandfs_segsum_valid(struct nandfs_segment_summary *segsum)
|
|
{
|
|
|
|
return (segsum->ss_magic == NANDFS_SEGSUM_MAGIC);
|
|
}
|
|
|
|
int
|
|
nandfs_load_segsum(struct nandfs_device *fsdev, nandfs_daddr_t blocknr,
|
|
struct nandfs_segment_summary *segsum)
|
|
{
|
|
struct buf *bp;
|
|
int error;
|
|
|
|
DPRINTF(VOLUMES, ("nandfs: try segsum at block %jx\n",
|
|
(uintmax_t)blocknr));
|
|
|
|
error = nandfs_dev_bread(fsdev, blocknr, NOCRED, 0, &bp);
|
|
if (error)
|
|
return (error);
|
|
|
|
memcpy(segsum, bp->b_data, sizeof(struct nandfs_segment_summary));
|
|
brelse(bp);
|
|
|
|
if (!nandfs_segsum_valid(segsum)) {
|
|
DPRINTF(VOLUMES, ("%s: bad magic pseg:%jx\n", __func__,
|
|
blocknr));
|
|
return (EINVAL);
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
nandfs_load_super_root(struct nandfs_device *nandfsdev,
|
|
struct nandfs_segment_summary *segsum, uint64_t pseg)
|
|
{
|
|
struct nandfs_super_root super_root;
|
|
struct buf *bp;
|
|
uint64_t blocknr;
|
|
uint32_t super_root_crc, comp_crc;
|
|
int off, error;
|
|
|
|
/* Check if there is a superroot */
|
|
if ((segsum->ss_flags & NANDFS_SS_SR) == 0) {
|
|
DPRINTF(VOLUMES, ("%s: no super root in pseg:%jx\n", __func__,
|
|
pseg));
|
|
return (ENOENT);
|
|
}
|
|
|
|
/* Get our super root, located at the end of the pseg */
|
|
blocknr = pseg + segsum->ss_nblocks - 1;
|
|
DPRINTF(VOLUMES, ("%s: try at %#jx\n", __func__, (uintmax_t)blocknr));
|
|
|
|
error = nandfs_dev_bread(nandfsdev, blocknr, NOCRED, 0, &bp);
|
|
if (error)
|
|
return (error);
|
|
|
|
memcpy(&super_root, bp->b_data, sizeof(struct nandfs_super_root));
|
|
brelse(bp);
|
|
|
|
/* Check super root CRC */
|
|
super_root_crc = super_root.sr_sum;
|
|
off = sizeof(super_root.sr_sum);
|
|
comp_crc = crc32((uint8_t *)&super_root + off,
|
|
NANDFS_SR_BYTES - off);
|
|
|
|
if (super_root_crc != comp_crc) {
|
|
DPRINTF(VOLUMES, ("%s: invalid crc:%#x [expect:%#x]\n",
|
|
__func__, super_root_crc, comp_crc));
|
|
return (EINVAL);
|
|
}
|
|
|
|
nandfsdev->nd_super_root = super_root;
|
|
DPRINTF(VOLUMES, ("%s: got valid superroot\n", __func__));
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Search for the last super root recorded.
|
|
*/
|
|
int
|
|
nandfs_search_super_root(struct nandfs_device *nandfsdev)
|
|
{
|
|
struct nandfs_super_block *super;
|
|
struct nandfs_segment_summary segsum;
|
|
uint64_t seg_start, seg_end, cno, seq, create, pseg;
|
|
uint64_t segnum;
|
|
int error, found;
|
|
|
|
error = found = 0;
|
|
|
|
/* Search for last super root */
|
|
pseg = nandfsdev->nd_super.s_last_pseg;
|
|
segnum = nandfs_get_segnum_of_block(nandfsdev, pseg);
|
|
|
|
cno = nandfsdev->nd_super.s_last_cno;
|
|
create = seq = 0;
|
|
DPRINTF(VOLUMES, ("%s: start in pseg %#jx\n", __func__,
|
|
(uintmax_t)pseg));
|
|
|
|
for (;;) {
|
|
error = nandfs_load_segsum(nandfsdev, pseg, &segsum);
|
|
if (error)
|
|
break;
|
|
|
|
if (segsum.ss_seq < seq || segsum.ss_create < create)
|
|
break;
|
|
|
|
/* Try to load super root */
|
|
if (segsum.ss_flags & NANDFS_SS_SR) {
|
|
error = nandfs_load_super_root(nandfsdev, &segsum, pseg);
|
|
if (error)
|
|
break; /* confused */
|
|
found = 1;
|
|
|
|
super = &nandfsdev->nd_super;
|
|
nandfsdev->nd_last_segsum = segsum;
|
|
super->s_last_pseg = pseg;
|
|
super->s_last_cno = cno++;
|
|
super->s_last_seq = segsum.ss_seq;
|
|
super->s_state = NANDFS_VALID_FS;
|
|
seq = segsum.ss_seq;
|
|
create = segsum.ss_create;
|
|
} else {
|
|
seq = segsum.ss_seq;
|
|
create = segsum.ss_create;
|
|
}
|
|
|
|
/* Calculate next partial segment location */
|
|
pseg += segsum.ss_nblocks;
|
|
DPRINTF(VOLUMES, ("%s: next partial seg is %jx\n", __func__,
|
|
(uintmax_t)pseg));
|
|
|
|
/* Did we reach the end of the segment? if so, go to the next */
|
|
nandfs_get_segment_range(nandfsdev, segnum, &seg_start,
|
|
&seg_end);
|
|
if (pseg >= seg_end) {
|
|
pseg = segsum.ss_next;
|
|
DPRINTF(VOLUMES,
|
|
(" partial seg oor next is %jx[%jx - %jx]\n",
|
|
(uintmax_t)pseg, (uintmax_t)seg_start,
|
|
(uintmax_t)seg_end));
|
|
}
|
|
segnum = nandfs_get_segnum_of_block(nandfsdev, pseg);
|
|
}
|
|
|
|
if (error && !found)
|
|
return (error);
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
nandfs_get_node_raw(struct nandfs_device *nandfsdev, struct nandfsmount *nmp,
|
|
uint64_t ino, struct nandfs_inode *inode, struct nandfs_node **nodep)
|
|
{
|
|
struct nandfs_node *node;
|
|
struct vnode *nvp;
|
|
struct mount *mp;
|
|
int error;
|
|
|
|
*nodep = NULL;
|
|
|
|
/* Associate with mountpoint if present */
|
|
if (nmp) {
|
|
mp = nmp->nm_vfs_mountp;
|
|
error = getnewvnode("nandfs", mp, &nandfs_vnodeops, &nvp);
|
|
if (error) {
|
|
return (error);
|
|
}
|
|
} else {
|
|
mp = NULL;
|
|
error = getnewvnode("snandfs", mp, &nandfs_system_vnodeops,
|
|
&nvp);
|
|
if (error) {
|
|
return (error);
|
|
}
|
|
}
|
|
|
|
if (mp)
|
|
NANDFS_WRITELOCK(nandfsdev);
|
|
|
|
DPRINTF(IFILE, ("%s: ino: %#jx -> vp: %p\n",
|
|
__func__, (uintmax_t)ino, nvp));
|
|
/* Lock node */
|
|
lockmgr(nvp->v_vnlock, LK_EXCLUSIVE, NULL);
|
|
|
|
if (mp) {
|
|
error = insmntque(nvp, mp);
|
|
if (error != 0) {
|
|
*nodep = NULL;
|
|
return (error);
|
|
}
|
|
}
|
|
|
|
node = uma_zalloc(nandfs_node_zone, M_WAITOK | M_ZERO);
|
|
|
|
/* Crosslink */
|
|
node->nn_vnode = nvp;
|
|
nvp->v_bufobj.bo_ops = &buf_ops_nandfs;
|
|
node->nn_nmp = nmp;
|
|
node->nn_nandfsdev = nandfsdev;
|
|
nvp->v_data = node;
|
|
|
|
/* Initiase NANDFS node */
|
|
node->nn_ino = ino;
|
|
if (inode != NULL)
|
|
node->nn_inode = *inode;
|
|
|
|
nandfs_vinit(nvp, ino);
|
|
|
|
/* Return node */
|
|
*nodep = node;
|
|
DPRINTF(IFILE, ("%s: ino:%#jx vp:%p node:%p\n",
|
|
__func__, (uintmax_t)ino, nvp, *nodep));
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
nandfs_get_node(struct nandfsmount *nmp, uint64_t ino,
|
|
struct nandfs_node **nodep)
|
|
{
|
|
struct nandfs_device *nandfsdev;
|
|
struct nandfs_inode inode, *entry;
|
|
struct vnode *nvp, *vpp;
|
|
struct thread *td;
|
|
struct buf *bp;
|
|
uint64_t ivblocknr;
|
|
uint32_t entry_in_block;
|
|
int error;
|
|
|
|
/* Look up node in hash table */
|
|
td = curthread;
|
|
*nodep = NULL;
|
|
|
|
if ((ino < NANDFS_ATIME_INO) && (ino != NANDFS_ROOT_INO)) {
|
|
printf("nandfs_get_node: system ino %"PRIu64" not in mount "
|
|
"point!\n", ino);
|
|
return (ENOENT);
|
|
}
|
|
|
|
error = vfs_hash_get(nmp->nm_vfs_mountp, ino, LK_EXCLUSIVE, td, &nvp,
|
|
NULL, NULL);
|
|
if (error)
|
|
return (error);
|
|
|
|
if (nvp != NULL) {
|
|
*nodep = (struct nandfs_node *)nvp->v_data;
|
|
return (0);
|
|
}
|
|
|
|
/* Look up inode structure in mountpoints ifile */
|
|
nandfsdev = nmp->nm_nandfsdev;
|
|
nandfs_mdt_trans(&nandfsdev->nd_ifile_mdt, ino, &ivblocknr,
|
|
&entry_in_block);
|
|
|
|
VOP_LOCK(NTOV(nmp->nm_ifile_node), LK_SHARED);
|
|
error = nandfs_bread(nmp->nm_ifile_node, ivblocknr, NOCRED, 0, &bp);
|
|
if (error) {
|
|
brelse(bp);
|
|
VOP_UNLOCK(NTOV(nmp->nm_ifile_node), 0);
|
|
return (ENOENT);
|
|
}
|
|
|
|
/* Get inode entry */
|
|
entry = (struct nandfs_inode *) bp->b_data + entry_in_block;
|
|
memcpy(&inode, entry, sizeof(struct nandfs_inode));
|
|
brelse(bp);
|
|
VOP_UNLOCK(NTOV(nmp->nm_ifile_node), 0);
|
|
|
|
/* Get node */
|
|
error = nandfs_get_node_raw(nmp->nm_nandfsdev, nmp, ino, &inode, nodep);
|
|
if (error) {
|
|
*nodep = NULL;
|
|
return (error);
|
|
}
|
|
|
|
nvp = (*nodep)->nn_vnode;
|
|
error = vfs_hash_insert(nvp, ino, 0, td, &vpp, NULL, NULL);
|
|
if (error) {
|
|
*nodep = NULL;
|
|
return (error);
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
void
|
|
nandfs_dispose_node(struct nandfs_node **nodep)
|
|
{
|
|
struct nandfs_node *node;
|
|
struct vnode *vp;
|
|
|
|
/* Protect against rogue values */
|
|
node = *nodep;
|
|
if (!node) {
|
|
return;
|
|
}
|
|
DPRINTF(NODE, ("nandfs_dispose_node: %p\n", *nodep));
|
|
|
|
vp = NTOV(node);
|
|
vp->v_data = NULL;
|
|
|
|
/* Free our associated memory */
|
|
uma_zfree(nandfs_node_zone, node);
|
|
|
|
*nodep = NULL;
|
|
}
|
|
|
|
int
|
|
nandfs_lookup_name_in_dir(struct vnode *dvp, const char *name, int namelen,
|
|
uint64_t *ino, int *found, uint64_t *off)
|
|
{
|
|
struct nandfs_node *dir_node = VTON(dvp);
|
|
struct nandfs_dir_entry *ndirent;
|
|
struct buf *bp;
|
|
uint64_t file_size, diroffset, blkoff;
|
|
uint64_t blocknr;
|
|
uint32_t blocksize = dir_node->nn_nandfsdev->nd_blocksize;
|
|
uint8_t *pos, name_len;
|
|
int error;
|
|
|
|
*found = 0;
|
|
|
|
DPRINTF(VNCALL, ("%s: %s file\n", __func__, name));
|
|
if (dvp->v_type != VDIR) {
|
|
return (ENOTDIR);
|
|
}
|
|
|
|
/* Get directory filesize */
|
|
file_size = dir_node->nn_inode.i_size;
|
|
|
|
/* Walk the directory */
|
|
diroffset = 0;
|
|
blocknr = 0;
|
|
blkoff = 0;
|
|
error = nandfs_bread(dir_node, blocknr, NOCRED, 0, &bp);
|
|
if (error) {
|
|
brelse(bp);
|
|
return (EIO);
|
|
}
|
|
|
|
while (diroffset < file_size) {
|
|
if (blkoff >= blocksize) {
|
|
blkoff = 0; blocknr++;
|
|
brelse(bp);
|
|
error = nandfs_bread(dir_node, blocknr, NOCRED, 0,
|
|
&bp);
|
|
if (error) {
|
|
brelse(bp);
|
|
return (EIO);
|
|
}
|
|
}
|
|
|
|
/* Read in one dirent */
|
|
pos = (uint8_t *) bp->b_data + blkoff;
|
|
ndirent = (struct nandfs_dir_entry *) pos;
|
|
name_len = ndirent->name_len;
|
|
|
|
if ((name_len == namelen) &&
|
|
(strncmp(name, ndirent->name, name_len) == 0) &&
|
|
(ndirent->inode != 0)) {
|
|
*ino = ndirent->inode;
|
|
*off = diroffset;
|
|
DPRINTF(LOOKUP, ("found `%.*s` with ino %"PRIx64"\n",
|
|
name_len, ndirent->name, *ino));
|
|
*found = 1;
|
|
break;
|
|
}
|
|
|
|
/* Advance */
|
|
diroffset += ndirent->rec_len;
|
|
blkoff += ndirent->rec_len;
|
|
}
|
|
brelse(bp);
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
nandfs_get_fsinfo(struct nandfsmount *nmp, struct nandfs_fsinfo *fsinfo)
|
|
{
|
|
struct nandfs_device *fsdev;
|
|
|
|
fsdev = nmp->nm_nandfsdev;
|
|
|
|
memcpy(&fsinfo->fs_fsdata, &fsdev->nd_fsdata, sizeof(fsdev->nd_fsdata));
|
|
memcpy(&fsinfo->fs_super, &fsdev->nd_super, sizeof(fsdev->nd_super));
|
|
snprintf(fsinfo->fs_dev, sizeof(fsinfo->fs_dev),
|
|
"%s", nmp->nm_vfs_mountp->mnt_stat.f_mntfromname);
|
|
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
nandfs_inode_init(struct nandfs_inode *inode, uint16_t mode)
|
|
{
|
|
struct timespec ts;
|
|
|
|
vfs_timestamp(&ts);
|
|
|
|
inode->i_blocks = 0;
|
|
inode->i_size = 0;
|
|
inode->i_ctime = ts.tv_sec;
|
|
inode->i_ctime_nsec = ts.tv_nsec;
|
|
inode->i_mtime = ts.tv_sec;
|
|
inode->i_mtime_nsec = ts.tv_nsec;
|
|
inode->i_mode = mode;
|
|
inode->i_links_count = 1;
|
|
if (S_ISDIR(mode))
|
|
inode->i_links_count = 2;
|
|
inode->i_flags = 0;
|
|
|
|
inode->i_special = 0;
|
|
memset(inode->i_db, 0, sizeof(inode->i_db));
|
|
memset(inode->i_ib, 0, sizeof(inode->i_ib));
|
|
}
|
|
|
|
void
|
|
nandfs_inode_destroy(struct nandfs_inode *inode)
|
|
{
|
|
|
|
MPASS(inode->i_blocks == 0);
|
|
bzero(inode, sizeof(*inode));
|
|
}
|
|
|
|
int
|
|
nandfs_fs_full(struct nandfs_device *nffsdev)
|
|
{
|
|
uint64_t space, bps;
|
|
|
|
bps = nffsdev->nd_fsdata.f_blocks_per_segment;
|
|
space = (nffsdev->nd_clean_segs - 1) * bps;
|
|
|
|
DPRINTF(BUF, ("%s: bufs:%jx space:%jx\n", __func__,
|
|
(uintmax_t)nffsdev->nd_dirty_bufs, (uintmax_t)space));
|
|
|
|
if (nffsdev->nd_dirty_bufs + (10 * bps) >= space)
|
|
return (1);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
_nandfs_dirty_buf(struct buf *bp, int dirty_meta, int force)
|
|
{
|
|
struct nandfs_device *nffsdev;
|
|
struct nandfs_node *node;
|
|
uint64_t ino, bps;
|
|
|
|
if (NANDFS_ISGATHERED(bp)) {
|
|
bqrelse(bp);
|
|
return (0);
|
|
}
|
|
if ((bp->b_flags & (B_MANAGED | B_DELWRI)) == (B_MANAGED | B_DELWRI)) {
|
|
bqrelse(bp);
|
|
return (0);
|
|
}
|
|
|
|
node = VTON(bp->b_vp);
|
|
nffsdev = node->nn_nandfsdev;
|
|
DPRINTF(BUF, ("%s: buf:%p\n", __func__, bp));
|
|
ino = node->nn_ino;
|
|
|
|
if (nandfs_fs_full(nffsdev) && !NANDFS_SYS_NODE(ino) && !force) {
|
|
brelse(bp);
|
|
return (ENOSPC);
|
|
}
|
|
|
|
bp->b_flags |= B_MANAGED;
|
|
bdwrite(bp);
|
|
|
|
nandfs_dirty_bufs_increment(nffsdev);
|
|
|
|
KASSERT((bp->b_vp), ("vp missing for bp"));
|
|
KASSERT((nandfs_vblk_get(bp) || ino == NANDFS_DAT_INO),
|
|
("bp vblk is 0"));
|
|
|
|
/*
|
|
* To maintain consistency of FS we need to force making
|
|
* meta buffers dirty, even if free space is low.
|
|
*/
|
|
if (dirty_meta && ino != NANDFS_GC_INO)
|
|
nandfs_bmap_dirty_blocks(VTON(bp->b_vp), bp, 1);
|
|
|
|
bps = nffsdev->nd_fsdata.f_blocks_per_segment;
|
|
|
|
if (nffsdev->nd_dirty_bufs >= (bps * nandfs_max_dirty_segs)) {
|
|
mtx_lock(&nffsdev->nd_sync_mtx);
|
|
if (nffsdev->nd_syncing == 0) {
|
|
DPRINTF(SYNC, ("%s: wakeup gc\n", __func__));
|
|
nffsdev->nd_syncing = 1;
|
|
wakeup(&nffsdev->nd_syncing);
|
|
}
|
|
mtx_unlock(&nffsdev->nd_sync_mtx);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
nandfs_dirty_buf(struct buf *bp, int force)
|
|
{
|
|
|
|
return (_nandfs_dirty_buf(bp, 1, force));
|
|
}
|
|
|
|
int
|
|
nandfs_dirty_buf_meta(struct buf *bp, int force)
|
|
{
|
|
|
|
return (_nandfs_dirty_buf(bp, 0, force));
|
|
}
|
|
|
|
void
|
|
nandfs_undirty_buf_fsdev(struct nandfs_device *nffsdev, struct buf *bp)
|
|
{
|
|
|
|
BUF_ASSERT_HELD(bp);
|
|
|
|
if (bp->b_flags & B_DELWRI) {
|
|
bp->b_flags &= ~(B_DELWRI|B_MANAGED);
|
|
nandfs_dirty_bufs_decrement(nffsdev);
|
|
}
|
|
/*
|
|
* Since it is now being written, we can clear its deferred write flag.
|
|
*/
|
|
bp->b_flags &= ~B_DEFERRED;
|
|
|
|
brelse(bp);
|
|
}
|
|
|
|
void
|
|
nandfs_undirty_buf(struct buf *bp)
|
|
{
|
|
struct nandfs_node *node;
|
|
|
|
node = VTON(bp->b_vp);
|
|
|
|
nandfs_undirty_buf_fsdev(node->nn_nandfsdev, bp);
|
|
}
|
|
|
|
void
|
|
nandfs_vblk_set(struct buf *bp, nandfs_daddr_t blocknr)
|
|
{
|
|
|
|
nandfs_daddr_t *vblk = (nandfs_daddr_t *)(&bp->b_fsprivate1);
|
|
*vblk = blocknr;
|
|
}
|
|
|
|
nandfs_daddr_t
|
|
nandfs_vblk_get(struct buf *bp)
|
|
{
|
|
|
|
nandfs_daddr_t *vblk = (nandfs_daddr_t *)(&bp->b_fsprivate1);
|
|
return (*vblk);
|
|
}
|
|
|
|
void
|
|
nandfs_buf_set(struct buf *bp, uint32_t bits)
|
|
{
|
|
uintptr_t flags;
|
|
|
|
flags = (uintptr_t)bp->b_fsprivate3;
|
|
flags |= (uintptr_t)bits;
|
|
bp->b_fsprivate3 = (void *)flags;
|
|
}
|
|
|
|
void
|
|
nandfs_buf_clear(struct buf *bp, uint32_t bits)
|
|
{
|
|
uintptr_t flags;
|
|
|
|
flags = (uintptr_t)bp->b_fsprivate3;
|
|
flags &= ~(uintptr_t)bits;
|
|
bp->b_fsprivate3 = (void *)flags;
|
|
}
|
|
|
|
int
|
|
nandfs_buf_check(struct buf *bp, uint32_t bits)
|
|
{
|
|
uintptr_t flags;
|
|
|
|
flags = (uintptr_t)bp->b_fsprivate3;
|
|
if (flags & bits)
|
|
return (1);
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
nandfs_erase(struct nandfs_device *fsdev, off_t offset, size_t size)
|
|
{
|
|
struct buf *bp;
|
|
int read_size, error, i;
|
|
|
|
DPRINTF(BLOCK, ("%s: performing erase at offset %jx size %zx\n",
|
|
__func__, offset, size));
|
|
|
|
MPASS(size % fsdev->nd_erasesize == 0);
|
|
|
|
if (fsdev->nd_is_nand) {
|
|
error = g_delete_data(fsdev->nd_gconsumer, offset, size);
|
|
return (error);
|
|
}
|
|
|
|
if (size > MAXBSIZE)
|
|
read_size = MAXBSIZE;
|
|
else
|
|
read_size = size;
|
|
|
|
error = 0;
|
|
for (i = 0; i < size / MAXBSIZE; i++) {
|
|
error = bread(fsdev->nd_devvp, btodb(offset + i * read_size),
|
|
read_size, NOCRED, &bp);
|
|
if (error) {
|
|
brelse(bp);
|
|
return (error);
|
|
}
|
|
memset(bp->b_data, 0xff, read_size);
|
|
error = bwrite(bp);
|
|
if (error) {
|
|
nandfs_error("%s: err:%d from bwrite\n",
|
|
__func__, error);
|
|
return (error);
|
|
}
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
nandfs_vop_islocked(struct vnode *vp)
|
|
{
|
|
int islocked;
|
|
|
|
islocked = VOP_ISLOCKED(vp);
|
|
return (islocked == LK_EXCLUSIVE || islocked == LK_SHARED);
|
|
}
|
|
|
|
nandfs_daddr_t
|
|
nandfs_block_to_dblock(struct nandfs_device *fsdev, nandfs_lbn_t block)
|
|
{
|
|
|
|
return (btodb(block * fsdev->nd_blocksize));
|
|
}
|