nandfs_bmap.c

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2010-2012 Semihalf
    5  * Copyright (c) 2008, 2009 Reinoud Zandijk
    6  * All rights reserved.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   27  *
   28  * From: NetBSD: nilfs_subr.c,v 1.4 2009/07/29 17:06:57 reinoud
   29  */
   30 
   31 #include <sys/cdefs.h>
   32 __FBSDID("$FreeBSD$");
   33 
   34 #include <sys/param.h>
   35 #include <sys/systm.h>
   36 #include <sys/namei.h>
   37 #include <sys/kernel.h>
   38 #include <sys/stat.h>
   39 #include <sys/buf.h>
   40 #include <sys/bio.h>
   41 #include <sys/proc.h>
   42 #include <sys/mount.h>
   43 #include <sys/vnode.h>
   44 #include <sys/signalvar.h>
   45 #include <sys/malloc.h>
   46 #include <sys/dirent.h>
   47 #include <sys/lockf.h>
   48 #include <sys/ktr.h>
   49 
   50 #include <vm/vm.h>
   51 #include <vm/vm_extern.h>
   52 #include <vm/vm_object.h>
   53 #include <vm/vnode_pager.h>
   54 
   55 #include <machine/_inttypes.h>
   56 
   57 #include <vm/vm.h>
   58 #include <vm/vm_extern.h>
   59 #include <vm/vm_object.h>
   60 #include <vm/vnode_pager.h>
   61 
   62 #include "nandfs_mount.h"
   63 #include "nandfs.h"
   64 #include "nandfs_subr.h"
   65 #include "bmap.h"
   66 
   67 nandfs_lbn_t
   68 nandfs_get_maxfilesize(struct nandfs_device *fsdev)
   69 {
   70 
   71         return (get_maxfilesize(fsdev));
   72 }
   73 
   74 int
   75 nandfs_bmap_lookup(struct nandfs_node *node, nandfs_lbn_t lblk,
   76     nandfs_daddr_t *vblk)
   77 {
   78         int error = 0;
   79 
   80         if (node->nn_ino == NANDFS_GC_INO && lblk >= 0)
   81                 *vblk = lblk;
   82         else
   83                 error = bmap_lookup(node, lblk, vblk);
   84 
   85         DPRINTF(TRANSLATE, ("%s: error %d ino %#jx lblocknr %#jx -> %#jx\n",
   86             __func__, error, (uintmax_t)node->nn_ino, (uintmax_t)lblk,
   87             (uintmax_t)*vblk));
   88 
   89         if (error)
   90                 nandfs_error("%s: returned %d", __func__, error);
   91 
   92         return (error);
   93 }
   94 
   95 int
   96 nandfs_bmap_insert_block(struct nandfs_node *node, nandfs_lbn_t lblk,
   97     struct buf *bp)
   98 {
   99         struct nandfs_device *fsdev;
  100         nandfs_daddr_t vblk;
  101         int error;
  102 
  103         fsdev = node->nn_nandfsdev;
  104 
  105         vblk = 0;
  106         if (node->nn_ino != NANDFS_DAT_INO) {
  107                 error = nandfs_vblock_alloc(fsdev, &vblk);
  108                 if (error)
  109                         return (error);
  110         }
  111 
  112         nandfs_buf_set(bp, NANDFS_VBLK_ASSIGNED);
  113         nandfs_vblk_set(bp, vblk);
  114 
  115         error = bmap_insert_block(node, lblk, vblk);
  116         if (error) {
  117                 nandfs_vblock_free(fsdev, vblk);
  118                 return (error);
  119         }
  120 
  121         return (0);
  122 }
  123 
  124 int
  125 nandfs_bmap_dirty_blocks(struct nandfs_node *node, struct buf *bp, int force)
  126 {
  127         int error;
  128 
  129         error = bmap_dirty_meta(node, bp->b_lblkno, force);
  130         if (error)
  131                 nandfs_error("%s: cannot dirty buffer %p\n",
  132                     __func__, bp);
  133 
  134         return (error);
  135 }
  136 
  137 static int
  138 nandfs_bmap_update_mapping(struct nandfs_node *node, nandfs_lbn_t lblk,
  139     nandfs_daddr_t blknr)
  140 {
  141         int error;
  142 
  143         DPRINTF(BMAP,
  144             ("%s: node: %p ino: %#jx lblk: %#jx vblk: %#jx\n",
  145             __func__, node, (uintmax_t)node->nn_ino, (uintmax_t)lblk,
  146             (uintmax_t)blknr));
  147 
  148         error = bmap_insert_block(node, lblk, blknr);
  149 
  150         return (error);
  151 }
  152 
  153 int
  154 nandfs_bmap_update_block(struct nandfs_node *node, struct buf *bp,
  155     nandfs_lbn_t blknr)
  156 {
  157         nandfs_lbn_t lblk;
  158         int error;
  159 
  160         lblk = bp->b_lblkno;
  161         nandfs_vblk_set(bp, blknr);
  162 
  163         DPRINTF(BMAP, ("%s: node: %p ino: %#jx bp: %p lblk: %#jx blk: %#jx\n",
  164             __func__, node, (uintmax_t)node->nn_ino, bp,
  165             (uintmax_t)lblk, (uintmax_t)blknr));
  166 
  167         error = nandfs_bmap_update_mapping(node, lblk, blknr);
  168         if (error) {
  169                 nandfs_error("%s: cannot update lblk:%jx to blk:%jx for "
  170                     "node:%p, error:%d\n", __func__, (uintmax_t)lblk,
  171                     (uintmax_t)blknr, node, error);
  172                 return (error);
  173         }
  174 
  175         return (error);
  176 }
  177 
  178 int
  179 nandfs_bmap_update_dat(struct nandfs_node *node, nandfs_daddr_t oldblk,
  180     struct buf *bp)
  181 {
  182         struct nandfs_device *fsdev;
  183         nandfs_daddr_t vblk = 0;
  184         int error;
  185 
  186         if (node->nn_ino == NANDFS_DAT_INO)
  187                 return (0);
  188 
  189         if (nandfs_buf_check(bp, NANDFS_VBLK_ASSIGNED)) {
  190                 nandfs_buf_clear(bp, NANDFS_VBLK_ASSIGNED);
  191                 return (0);
  192         }
  193 
  194         fsdev = node->nn_nandfsdev;
  195 
  196         /* First alloc new virtual block.... */
  197         error = nandfs_vblock_alloc(fsdev, &vblk);
  198         if (error)
  199                 return (error);
  200 
  201         error = nandfs_bmap_update_block(node, bp, vblk);
  202         if (error)
  203                 return (error);
  204 
  205         /* Then we can end up with old one */
  206         nandfs_vblock_end(fsdev, oldblk);
  207 
  208         DPRINTF(BMAP,
  209             ("%s: ino %#jx block %#jx: update vblk %#jx to %#jx\n",
  210             __func__, (uintmax_t)node->nn_ino, (uintmax_t)bp->b_lblkno,
  211             (uintmax_t)oldblk, (uintmax_t)vblk));
  212         return (error);
  213 }
  214 
  215 int
  216 nandfs_bmap_truncate_mapping(struct nandfs_node *node, nandfs_lbn_t oblk,
  217     nandfs_lbn_t nblk)
  218 {
  219         nandfs_lbn_t todo;
  220         int error;
  221 
  222         todo = oblk - nblk;
  223 
  224         DPRINTF(BMAP, ("%s: node %p oblk %jx nblk %jx truncate by %jx\n",
  225             __func__, node, oblk, nblk, todo));
  226 
  227         error = bmap_truncate_mapping(node, oblk, todo);
  228         if (error)
  229                 return (error);
  230 
  231         return (error);
  232 }

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FreeBSD/Linux Kernel Cross Reference sys/fs/nandfs/nandfs_bmap.c

FreeBSD/Linux Kernel Cross Reference
sys/fs/nandfs/nandfs_bmap.c